Update external-pr.yml

Author: ammarwa

.github/workflows/external-pr.yml

@@ -40,7 +40,7 @@ jobs:
       - uses: repo-sync/github-sync@v2
         name: Push branch to Internal Repository
         with:
-          source_repo: "https://github.com/ROCm/aqlprofile.git"
+          source_repo: "https://${{ secrets.GITHUB_TOKEN }}@github.com/ROCm/aqlprofile.git"
           source_branch: "${{ github.event.pull_request.head.ref }}"
           destination_repo: "https://${{ secrets.INTERNAL_REPO_TOKEN }}@github.com/AMD-ROCm-Internal/aqlprofile.git"
           destination_branch: "external-pr-${{ github.event.pull_request.number }}"