Run release site action only for release tags

Author: robtimus

.github/workflows/release-site.yml

@@ -15,7 +15,8 @@
 name: Release site
 
 on:
-  workflow_dispatch:
+  push:
+    tags: ['[0-9]+.[0-9]+*']
 
 jobs:
   release-site:
@@ -36,4 +37,4 @@ jobs:
         with:
           folder: 'docs'
           target-folder: 'apidocs'
-          commit-message: 'Initial content'
+          commit-message: 'Updated for version ${{ github.ref_name }}'