Update sync-main.yml

Author: dilanbhalla

.github/workflows/sync-main.yml

@@ -61,4 +61,6 @@ jobs:
             echo "PR already exists: $PR_URL"
           fi
         env:
-          GH_TOKEN: ${{ github.token }}
+          GH_TOKEN: ${{ secrets.WORKFLOW_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.WORKFLOW_TOKEN }}
+