Call dynamic-readme reusable workflow (#1126)

* 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.

* Remove final copyright year

Reference: thoughtbot/templates#23

.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

@@ -185,23 +185,12 @@ See the [contributing] document. Thank you, [contributors]!
 
 ## License
 
-Bourbon is copyright © 2011-2020 [thoughtbot, inc.][thoughtbot] It is free
+Bourbon is copyright © 2011 [thoughtbot, inc.][thoughtbot] It is free
 software, and may be redistributed under the terms specified in the [license].
 
   [license]: LICENSE.md
 
-## About
+<!-- START /templates/footer.md -->
+<!-- END /templates/footer.md -->
 
-Bourbon is maintained by the thoughtbot design team. It is funded
-by [thoughtbot, inc.][thoughtbot] and the names and logos for thoughtbot are
-trademarks of thoughtbot, inc.
-
-[![thoughtbot][thoughtbot-logo]][thoughtbot]
-
-We love open-source software! See [our other projects][community] or
-[hire us][hire] to design, develop, and grow your product.
-
-  [thoughtbot]: https://thoughtbot.com?utm_source=github
-  [thoughtbot-logo]: https://thoughtbot.com/brand_assets/93:44.svg
-  [community]: https://thoughtbot.com/community?utm_source=github
-  [hire]: https://thoughtbot.com/hire-us?utm_source=github
+[thoughtbot]: https://thoughtbot.com?utm_source=github