ci(workflows/deps): bump actions/stale from 5 to 9 (#19)

Bumps [actions/stale](https://github.com/actions/stale) from 5 to 9.
- [Release notes](https://github.com/actions/stale/releases)
- [Changelog](https://github.com/actions/stale/blob/main/CHANGELOG.md)
- [Commits](actions/stale@v5...v9)

---
updated-dependencies:
- dependency-name: actions/stale
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/stale.yml

@@ -12,7 +12,7 @@ jobs:
       pull-requests: write # To close stale pull requests
 
     steps:
-    - uses: actions/stale@v5
+    - uses: actions/stale@v9
       env:
         DAYS_BEFORE_STALE: 60
         DAYS_BEFORE_CLOSE: 30