github: set ``expired`` label when closing PR or issues automatically [skip ci]

.github/workflows/issue_management.yml

@@ -17,6 +17,8 @@ jobs:
           stale-pr-message: 'This PR is stale because it has been open 6 weeks with no activity. Remove stale label or comment or this will be closed in 2 weeks.'
           days-before-stale: 42
           days-before-close: 14
+          close-issue-label: expired
+          close-pr-label: expired
           exempt-issue-labels: bug
           remove-stale-when-updated: true
           operations-per-run: 500