try fully qualified path to workflow

Author: meltsufin

.github/workflows/multi_approvers.yaml

@@ -49,7 +49,7 @@ jobs:
         members_path: ${{ steps.download_members.outputs.output-file }}
 
   multi-approvers:
-    uses: ./.github/workflows/multi-approvers.yml
     needs: download_members
+    uses: 'googleapis/google-auth-library-java/.github/workflows/multi-approvers.yml@multi-approvers'
     with:
       org-members-path: ${{ needs.download_members.outputs.members_path }}