Call dynamic-readme reusable workflow

We want to have a way to edit our README footer at one place and have the changes from there be propagated to our repos.

By adding this snippet in the README, we call this reusable workflow: https://github.com/thoughtbot/templates/blob/main/.github/workflows/dynamic-readme.yaml that renders and updates the README footer dynamically.

.github/workflows/dynamic-readme.yml

@@ -0,0 +1,17 @@
+name: update-templates
+
+on: 
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  update-templates:
+    permissions:
+      contents: write
+      pull-requests: write
+      pages: write
+    uses: thoughtbot/templates/.github/workflows/dynamic-readme.yaml@main
+    secrets:
+      token: ${{ secrets.GITHUB_TOKEN }}

README.md

@@ -113,16 +113,5 @@ Go back to you App settings page, click "Add features and functionality >
 Permissions", then copy the "User OAuth Token" and set it to `SLACK_API_TOKEN`
 in your `.env` file.
 
-## About thoughtbot
-
-![thoughtbot](https://thoughtbot.com/brand_assets/93:44.svg)
-
-Gold Miner is maintained and funded by thoughtbot.
-The names and logos for thoughtbot are trademarks of thoughtbot, inc.
-
-We love open source software!
-See [our other projects][community] or
-[hire us][hire] to design, develop, and grow your product.
-
-[community]: https://thoughtbot.com/community?utm_source=github
-[hire]: https://thoughtbot.com?utm_source=github
+<!-- START /templates/footer.md -->
+<!-- END /templates/footer.md -->