Bump actions/stale from 3.0.19 to 4 (#132)

Bump actions/stale from 3.0.19 to 4 (#132)

Bumps [actions/stale](https://github.com/actions/stale) from 3.0.19 to 4.
- [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/v3.0.19...v4)

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

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