Update dynamic README workflow to open a Pull Request (#31)

* Update dynamic render workflow

Some repositories have a protected branch rule. That means
our workflow won't work because commiting directly to main
is not allowed. To prevent that, the workflow will now
open a PR for the changes.

* Update workflow example

We only want to run this workflow if the README has changed, not
on every change.

* Removing leading / from snippet

As @nickcharlton pointed out,

> the leading / implies to me the start of a filesystem,
which it presumably isn't.

I tested removing it and it worked, so it was probably
needed when I was testing things but it's not needed anymore.

* Use latest workflow version

.github/workflows/dynamic-readme-example.yaml

@@ -1,7 +1,9 @@
 name: update-templates
 
-on: 
+on:
   push:
+    paths:
+      - README.md
     branches:
       - main
   workflow_dispatch:

.github/workflows/dynamic-readme.yaml

@@ -29,6 +29,24 @@ jobs:
             README.md
           committer_name: github-actions[bot]
           committer_email: github-actions[bot]@users.noreply.github.com
-          commit_message: 'docs: update readme file with markdown templates [skip ci]'
+          commit_message: "docs: update readme file with markdown templates [skip ci]"
+          confirm_and_push: false
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Create pull request
+        id: cpr
+        uses: peter-evans/create-pull-request@v4
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          commit-message: "docs: documentation files updated [skip ci]"
+          committer: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
+          author: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
+          signoff: false
+          branch: github-actions/repository-maintenance
+          delete-branch: true
+          title: "Automatically Generated: Update Dynamic Section in README"
+          body: |
+            This PR was automatically generated to update the dynamic section in the README file.
+            Whenever the README is updated, this workflow is triggered to dynamically render the snippet
+            used in the README.

README.md

@@ -37,19 +37,5 @@ under the terms specified in the [LICENSE] file.
 
 [LICENSE]: /LICENSE
 
-<!-- START /templates/footer.md -->
-## About thoughtbot
-
-![thoughtbot](https://thoughtbot.com/thoughtbot-logo-for-readmes.svg)
-
-This repo is maintained and funded by thoughtbot, inc.
-The names and logos for thoughtbot are trademarks of thoughtbot, inc.
-
-We love open source software!
-See [our other projects][community].
-We are [available for hire][hire].
-
-[community]: https://thoughtbot.com/community?utm_source=github
-[hire]: https://thoughtbot.com/hire-us?utm_source=github
-
-<!-- END /templates/footer.md -->
+<!-- START templates/footer.md -->
+<!-- END templates/footer.md -->