Update frontend.yml to run only on main (#714)

* Update frontend.yml

* Update frontend.yml

Author: IFenton

.github/workflows/frontend.yml

@@ -14,7 +14,7 @@ jobs:
         fetch-depth: 0
 
     - name: Update branch
-      if: github.event.pull_request.head.repo.full_name == github.repository
+      if: github.ref == 'refs/heads/main' && github.event_name == 'push'
       run: |
         git config user.name "github-actions[bot]"
         git config user.email "41898282+github-actions[bot]@users.noreply.github.com"