Give actions/stale needed permissions (open-telemetry#14858)

Author: trask

.github/workflows/issue-management-stale-action.yml

@@ -13,6 +13,7 @@ jobs:
   stale:
     permissions:
       contents: read
+      actions: write # because actions/stale deletes its old cache before saving new one
       issues: write  # for actions/stale to close stale issues
       pull-requests: write  # for actions/stale to close stale PRs
     runs-on: ubuntu-latest