fix(stale.yml): update path

# Description

- replace with agntcy/github-reusable-workflows/.github/workflows/_stale.yml@main

## Type of Change

- [x] Bugfix

## Checklist

- [x] I have read the [contributing guidelines](/agntcy/repo-template/blob/main/CONTRIBUTING.md)
- [x] Existing issues have been referenced (where applicable)
- [x] I have verified this change is not present in other open pull requests
- [x] Functionality is documented
- [x] All code style checks pass
- [x] New code contribution is covered by automated tests
- [x] All new and existing tests pass

Author: sriaradhyula

Diff for: .github/workflows/stale.yml

@@ -14,7 +14,7 @@ permissions: read-all
 jobs:
   mark-stale:
     # Call reusable workflow file
-    uses: agntcy/.github/.github/workflows/_stale.yml@main
+    uses: agntcy/github-reusable-workflows/.github/workflows/_stale.yml@main
     permissions:
       contents: read
       issues: write