Fix AI PR Review job condition to ensure it only runs on pull requests

Author: shps951023

.github/workflows/ci.yml

@@ -40,6 +40,7 @@ jobs:
           path: '**/test-results.trx'
 
   ai-pr-review:
+    if: github.event_name == 'pull_request'
     runs-on: ubuntu-latest
     needs: build