Cicd: Fix: Re-enable build on push

Author: goingforbrooke

.github/workflows/publish_site.yaml

@@ -3,7 +3,8 @@ name: Build and Deploy GH Pages
 
 on:
   push:
-    branches: [$default-branch]
+    branches:
+      - [$default-branch]
 
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch: