Only run this workflow if the README has been updated (#1635)

Author: sbs-cats

.github/workflows/dynamic-readme.yml

@@ -1,9 +1,11 @@
 name: update-templates
 
-on: 
+on:
   push:
     branches:
       - main
+    paths:
+      - README.md
   workflow_dispatch:
 
 jobs:

README.md

@@ -82,6 +82,7 @@ software, and may be redistributed under the terms specified in the
 [LICENSE]: https://github.com/thoughtbot/factory_bot/blob/main/LICENSE
 
 <!-- START /templates/footer.md -->
+
 <!-- END /templates/footer.md -->
 
 [ci-image]: https://github.com/thoughtbot/factory_bot/actions/workflows/build.yml/badge.svg?branch=main