Downgrade stale bot to v8 and fix permissions

.github/workflows/stale.yml

@@ -3,13 +3,14 @@ on:
   schedule:
     - cron: '30 1 * * *'
 
+permissions:
+  issues: write
+
 jobs:
   stale:
     runs-on: ubuntu-latest
-    permissions:
-      issues: write
     steps:
-      - uses: actions/stale@v9
+      - uses: actions/stale@v8
         with:
           stale-issue-message: 'This issue has been marked as stale because it has been open for 30 days with no activity. This thread will be automatically closed in 5 days if no further activity occurs.'
           exempt-issue-labels: 'bug,exporters,good first issue,onnx,onnxruntime,quantization'