prevent persisting credentials

Author: jakmagaud

.github/workflows/repo-sync.yml

@@ -10,6 +10,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
+      with:
+        persist-credentials: false
 
     - uses: repo-sync/github-sync@v2
       name: Sync repo to branch