Update stale.yml

A change in permissions policy for GitHub actions within Microsoft's GitHub Enterprise requires that this permission block be added to the Stalebot config file.

Author: huypub

.github/workflows/stale.yml

@@ -8,6 +8,9 @@ jobs:
   stale:
 
     runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
 
     steps:
     - uses: actions/stale@v4