fix(CI): revert sleep + fix shadowing variable issue (#9106)

.github/workflows/pr_labeler.yml

@@ -6,10 +6,6 @@ jobs:
   triage:
     runs-on: ubuntu-20.04
     steps:
-      # This delay is necessary to correctly trigger builds on label application
-      - name: Sleep for 30 seconds
-        run: sleep 30s
-        shell: bash
       - uses: actions/labeler@v3
         with:
           repo-token: ${{ secrets.AC_GITHUB_TOKEN }}