Give actions permission to job

This is needed so that actions/stale@v9 can delete caches.
Without this permisson, the cache is never deleted leading to some
issues never being checked again.

.github/workflows/triage-stale-flaky-tests.yml

@@ -6,6 +6,7 @@ jobs:
     close:
         runs-on: ubuntu-latest
         permissions:
+            actions: write
             issues: write
         steps:
             - uses: actions/stale@v9