Bump actions/stale from 2.0.0 to 6.0.1

Bumps [actions/stale](https://github.com/actions/stale) from 2.0.0 to 6.0.1.
- [Release notes](https://github.com/actions/stale/releases)
- [Changelog](https://github.com/actions/stale/blob/main/CHANGELOG.md)
- [Commits](actions/stale@v2.0.0...v6.0.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/stale-issues.yml

@@ -7,7 +7,7 @@ jobs:
     stale:
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/stale@v2.0.0
+            - uses: actions/stale@v6.0.1
               with:
                   repo-token: ${{ secrets.GITHUB_TOKEN }}
                   stale-issue-message: "This issue is stale because it has been open 21 days with no activity. Remove stale label or comment or this will be closed in 7 days"