fix: add PR condition to GitHub Actions status comment

Prevent 404 error by only attempting to comment when running in a pull request context

.github/workflows/build.yml

@@ -144,7 +144,7 @@ jobs:
           fi
 
       - name: Report build status
-        if: always()
+        if: always() && github.event_name == 'pull_request'
         uses: actions/github-script@v6
         with:
           script: |