ci: auto update changelog in releases branch

.changelog

@@ -0,0 +1,32 @@
+## hordelib Changelog
+
+{{#each releases}}
+  {{#if href}}
+    #{{#unless major}}#{{/unless}} [{{title}}]({{href}})
+  {{else}}
+    ## {{title}}
+  {{/if}}
+
+  {{#if tag}}
+    {{niceDate}}
+  {{/if}}
+
+  {{#if summary}}
+    {{summary}}
+  {{/if}}
+
+  {{#each merges}}
+    - {{#if commit.breaking}}**Breaking change:** {{/if}}{{message}}{{#if href}} [`#{{id}}`]({{href}}){{/if}} ({{author}})
+  {{/each}}
+  {{#each fixes}}
+    - {{#if commit.breaking}}**Breaking change:** {{/if}}{{commit.subject}}{{#each fixes}}{{#if href}} [`#{{id}}`]({{href}}){{/if}}{{/each}}  ({{author}})
+  {{/each}}
+  {{#each commits}}
+    - {{#if breaking}}**Breaking change:** {{/if}}{{subject}}{{#if href}} [`{{shorthash}}`]({{href}}){{/if}}  ({{author}})
+  {{/each}}
+
+{{/each}}
+
+{{#unless options.hideCredit}}
+  Generated by [`auto-changelog`](https://github.com/CookPete/auto-changelog).
+{{/unless}}

.github/workflows/release.yml

@@ -18,7 +18,7 @@ jobs:
     # get us our version number.
     - name: "📣 Release on push"
       id: release
-      uses: rymndhng/release-on-push-action@master
+      uses: rymndhng/release-on-push-action@v0.28.0
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       with:
@@ -57,6 +57,14 @@ jobs:
         npm -g install auto-changelog
         auto-changelog
 
+    # Try to add the changelog back to the releases branch
+    - uses: EndBug/add-and-commit@v9
+      with:
+        add: 'CHANGELOG.md'
+        message: 'ci: update changelog'
+        committer_name: GitHub Actions
+        committer_email: [email protected]
+
     # Patches our requirements.txt and pyproject.toml
     # Build a changelog
     - name: "🔧 Prepare our build for release"