Fix GitHub Pages deployment to only run on push to main, skip PRs (#7)

* Initial plan

* Fix GitHub Pages deployment to only run on push to main

Co-authored-by: balloob <1444314+balloob@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: balloob <1444314+balloob@users.noreply.github.com>

Author: Copilot

.github/workflows/deploy.yml

@@ -53,6 +53,7 @@ jobs:
 
   # Deployment job
   deploy:
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
     environment:
       name: github-pages
       url: ${{ steps.deployment.outputs.page_url }}