ci(gh-pages): only publish docs on push to main

Docs publishing is only needed after merging, not on PRs.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: jgeluk

.github/workflows/gh-pages.yml

@@ -1,12 +1,9 @@
 name: Publish Docs
 
-# Controls when the action will run. Triggers the workflow on push or pull request
-# events but only for the main branch
+# Publish docs only after successful merge to main
 on:
   push:
     branches: [ main ]
-  pull_request:
-    branches: [ main ]
 
 # A workflow run is made up of one or more jobs that can run sequentially or in parallel
 jobs: