Remove changelog_generation.yml workflow.

I'm wondering if we should remove this workflow:
The workflow doesn't work anymore due to missing permissions. The workflow wants to merge changes directly into master which is not allowed anymore. It seems easier to just run this command once before releasing anyway.

CHANGELOG.md

@@ -1,5 +1,45 @@
 # 0.10.0 (Unreleased)
 
+FEATURES:
+
+* datasource/deployments: Adds additional parameter `name` to allow searching by exact deployment
+  name. ([#797](https://github.com/elastic/terraform-provider-ec/issues/797))
+* resource/deployment: Added support for autoscaling Machine Learning tier
+  only ([#761](https://github.com/elastic/terraform-provider-ec/issues/761))
+* resource/deployment: Added support for symbols and profiling
+  endpoints. ([#783](https://github.com/elastic/terraform-provider-ec/issues/783))
+* resource/deployment: Validate the Kibana is present when attempting to enable other stateless
+  resources. ([#792](https://github.com/elastic/terraform-provider-ec/issues/792))
+
+ENHANCEMENTS:
+
+* provider: Remove direct dependency on the old Terraform Plugin
+  SDK ([#720](https://github.com/elastic/terraform-provider-ec/issues/720))
+* provider: Update go version to 1.21 ([#713](https://github.com/elastic/terraform-provider-ec/issues/713))
+* resource/deployment: Add instance_configuration_version field to all resources and allow to update the
+  instance_configuration_id to a value not defined in the template.
+  resource/deployment: Add migrate_to_latest_hardware field to allow migrating to the latest deployment template values.
+  resource/deployment: Add latest_instance_configuration_id and latest_instance_configuration_version read-only
+  fields. ([#755](https://github.com/elastic/terraform-provider-ec/issues/755))
+
+BUG FIXES:
+
+* resource/deployment: Don't rewrite the observability deployment ID to `self` when it's been explicitly
+  configured. ([#789](https://github.com/elastic/terraform-provider-ec/issues/789))
+* resource/deployment: Fix issue setting the elasticsearch_username when resetting the
+  elasticsearch_password ([#777](https://github.com/elastic/terraform-provider-ec/issues/777))
+* resource/deployment: Fix segfaults during Create/Update when `elasticsearch` attribute contains both `strategy`
+  and `snapshot_source`.
+  resource/deployment: Fix segfaults during Create/Update when `elasticsearch` defines `snapshot` with `repository` that
+  doesn't contain `reference`. ([#719](https://github.com/elastic/terraform-provider-ec/issues/719))
+* resource/deployment: Persist the snapshot source settings during reads. This fixes
+  a [provider crash](https://github.com/elastic/terraform-provider-ec/issues/787) when creating a deployment from a
+  snapshot. ([#788](https://github.com/elastic/terraform-provider-ec/issues/788))
+* resource/deployment: Update the elasticsearch_username when resetting the
+  password. ([#752](https://github.com/elastic/terraform-provider-ec/issues/752))
+* resource/extension: Fix provider crash when updating the contents of an
+  extension. ([#749](https://github.com/elastic/terraform-provider-ec/issues/749))
+
 # 0.9.0 (September 22, 2023)
 
 FEATURES:

NOTICE

@@ -1,5 +1,5 @@
 terraform-provider-ec
-Copyright 2023 Elasticsearch B.V.
+Copyright 2022-2024 Elasticsearch B.V.
 
 This product includes software developed at Elasticsearch B.V. and
 third-party software developed by the licenses listed below.
@@ -8,6 +8,7 @@ third-party software developed by the licenses listed below.
 
 github.com/davecgh/go-spew                                    0BSD
 github.com/agext/levenshtein                                  Apache-2.0
+github.com/apparentlymart/go-textseg/v15                      Apache-2.0
 github.com/elastic/cloud-sdk-go                               Apache-2.0
 github.com/go-logr/logr                                       Apache-2.0
 github.com/go-logr/stdr                                       Apache-2.0
@@ -28,7 +29,7 @@ go.mongodb.org/mongo-driver                                   Apache-2.0
 go.opentelemetry.io/otel/trace                                Apache-2.0
 go.opentelemetry.io/otel                                      Apache-2.0
 google.golang.org/appengine                                   Apache-2.0
-google.golang.org/genproto                                    Apache-2.0
+google.golang.org/genproto/googleapis/rpc                     Apache-2.0
 google.golang.org/grpc                                        Apache-2.0
 gopkg.in/yaml.v2                                              Apache-2.0
 gopkg.in/yaml.v3                                              Apache-2.0
@@ -65,27 +66,27 @@ github.com/mitchellh/mapstructure                             MIT
 github.com/mitchellh/reflectwalk                              MIT
 github.com/stretchr/testify                                   MIT
 github.com/zclconf/go-cty                                     MIT
-github.com/hashicorp/errwrap                                  MPL-2.0
-github.com/hashicorp/go-checkpoint                            MPL-2.0
-github.com/hashicorp/go-cleanhttp                             MPL-2.0
-github.com/hashicorp/go-plugin                                MPL-2.0
-github.com/hashicorp/go-uuid                                  MPL-2.0
+github.com/hashicorp/go-multierror                            MPL-2.0
 github.com/hashicorp/go-version                               MPL-2.0
-github.com/hashicorp/hc-install                               MPL-2.0
 github.com/hashicorp/hcl/v2                                   MPL-2.0
-github.com/hashicorp/logutils                                 MPL-2.0
-github.com/hashicorp/terraform-exec                           MPL-2.0
-github.com/hashicorp/terraform-json                           MPL-2.0
 github.com/hashicorp/terraform-plugin-framework-validators    MPL-2.0
 github.com/hashicorp/terraform-plugin-framework               MPL-2.0
 github.com/hashicorp/terraform-plugin-go                      MPL-2.0
 github.com/hashicorp/terraform-plugin-log                     MPL-2.0
 github.com/hashicorp/terraform-plugin-sdk/v2                  MPL-2.0
+github.com/hashicorp/terraform-plugin-testing                 MPL-2.0
+github.com/hashicorp/terraform-registry-address               MPL-2.0
 github.com/hashicorp/terraform-svchost                        MPL-2.0
 github.com/hashicorp/yamux                                    MPL-2.0
-github.com/hashicorp/go-multierror                            MPL-2.0-no-copyleft-exception
-github.com/hashicorp/terraform-registry-address               MPL-2.0-no-copyleft-exception
+github.com/hashicorp/errwrap                                  MPL-2.0-no-copyleft-exception
+github.com/hashicorp/go-checkpoint                            MPL-2.0-no-copyleft-exception
+github.com/hashicorp/go-cleanhttp                             MPL-2.0-no-copyleft-exception
+github.com/hashicorp/go-plugin                                MPL-2.0-no-copyleft-exception
+github.com/hashicorp/go-uuid                                  MPL-2.0-no-copyleft-exception
+github.com/hashicorp/hc-install                               MPL-2.0-no-copyleft-exception
+github.com/hashicorp/logutils                                 MPL-2.0-no-copyleft-exception
+github.com/hashicorp/terraform-exec                           MPL-2.0-no-copyleft-exception
+github.com/hashicorp/terraform-json                           MPL-2.0-no-copyleft-exception
 github.com/ghodss/yaml                                        no license file was found
-github.com/apparentlymart/go-textseg/v13                      Unicode-TOU
 
 =========================================================================

developer_docs/RELEASE.md

@@ -43,11 +43,18 @@ Since we heavily depend on `github.com/elastic/cloud-sdk-go`, make sure that dep
 
 ### Generating a changelog for the new version
 
-The changelog should be automatically generated on each push to `master` or the relevant branch, and the resulting changelog can be found at the top level under `CHANGELOG.md`. It is generated from a set of `<pr>.txt` files that are saved as a changelog. 
+The changelog can be found at the top level under `CHANGELOG.md`. It is generated from a set of `<pr>.txt` files that
+are saved as a changelog.
+
+To update the changelog, run `make changelog`.
 
 #### Patch version changelog
 
-When releasing patch versions, the changelog will be branched out in the minor branch, once the 
+When releasing patch versions, the changelog will be branched out in the minor branch.
+
+### Ensure the NOTICE file is up-to-date
+
+Run `make notice` to update the `NOTICE`.
 
 ## Executing the release