chore: skip CI run on forks (#54219)

Running the action added in #53541 on forks will result in always failing, so we can skip it.

Fixes #54210

.github/workflows/pull_request_approved.yml

@@ -7,6 +7,7 @@ on:
 
 jobs:
   pr-approved-open:
+    if: github.repository_owner == 'vercel'
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3