chore(overwatch): Do not run on main (#3835)

Author: suejung-sentry

.github/workflows/ci.yml

@@ -338,6 +338,7 @@ jobs:
     name: Run Overwatch
     runs-on: ubuntu-latest
     needs: install
+    if: ${{ github.event_name == 'pull_request' }}
     steps:
       - name: Checkout
         uses: actions/checkout@v4