[Tool] new label approved to trigger admit test (StarRocks#13442)

fix pr label trigger admit job bug

.github/workflows/run-admit-test.yml

@@ -9,9 +9,9 @@ on:
 jobs:
   run-admit-test:
     runs-on: ubuntu-latest
+    if: ${{ github.event.label.name == 'Approved' }}
     steps:
       - name: PR comment
-        if: contains(github.event.pull_request.labels.*.name, 'Approved')
         uses: thollander/actions-comment-pull-request@v1
         with:
           message: |