chore: migrate runner to tenki

Author: tenki-staging[bot]

.github/workflows/pr-closed.yml

@@ -14,7 +14,7 @@ env:
 
 jobs:
   remove:
-    runs-on: ubuntu-latest
+    runs-on: tenki-staging-standard-autoscale
     steps:
       - uses: azure/login@v2
         name: Sign in to Azure
@@ -28,4 +28,4 @@ jobs:
           inlineScript: |
             az group delete \
               --name ${{ env.resourceGroupName }} \
-              --yes
+              --yes