CI: use app token for auto-response

.github/workflows/auto-response.yml

@@ -14,9 +14,15 @@ jobs:
   auto-response:
     runs-on: ubuntu-latest
     steps:
+      - uses: actions/create-github-app-token@v1
+        id: app-token
+        with:
+          app-id: "2729701"
+          private-key: ${{ secrets.GH_APP_PRIVATE_KEY }}
       - name: Handle labeled items
         uses: actions/github-script@v7
         with:
+          github-token: ${{ steps.app-token.outputs.token }}
           script: |
             const rules = [
               {