Adds permissions for stale workflow (#17183)

Co-authored-by: Ultralytics Assistant <135830346+UltralyticsAssistant@users.noreply.github.com>
Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>

.github/workflows/stale.yml

@@ -5,6 +5,10 @@ on:
   schedule:
     - cron: "0 0 * * *" # Runs at 00:00 UTC every day
 
+permissions:
+  pull-requests: write
+  issues: write
+  
 jobs:
   stale:
     runs-on: ubuntu-latest