ci(stale): bump checkout to v6 and github-script to v8 (#8213)

Author: soyuka

.github/workflows/stale.yml

@@ -25,8 +25,8 @@ jobs:
       DRY_RUN: ${{ github.event_name == 'workflow_dispatch' && inputs.dry_run || 'false' }}
       MAX_ACTIONS_PER_RUN: ${{ github.event_name == 'workflow_dispatch' && inputs.max_actions || '25' }}
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/github-script@v7
+      - uses: actions/checkout@v6
+      - uses: actions/github-script@v8
         with:
           script: |
             const script = require('./.github/scripts/stale.js');