Bump actions/stale from 5.2.0 to 6.0.0

Bumps [actions/stale](https://github.com/actions/stale) from 5.2.0 to 6.0.0.
- [Release notes](https://github.com/actions/stale/releases)
- [Changelog](https://github.com/actions/stale/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/stale/compare/v5.2.0...v6.0.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/stale.yml

@@ -13,7 +13,7 @@ jobs:
       issues: write
 
     steps:
-    - uses: actions/stale@v5.2.0
+    - uses: actions/stale@v6.0.0
       with:
         repo-token: ${{ secrets.GITHUB_TOKEN }}
         days-before-stale: 30