Bumps [markdownlint](https://github.com/DavidAnson/markdownlint) from 0.30.0 to 0.31.0.
- [Changelog](https://github.com/DavidAnson/markdownlint/blob/main/CHANGELOG.md)
- [Commits](https://github.com/DavidAnson/markdownlint/compare/v0.30.0...v0.31.0)

---
updated-dependencies:
- dependency-name: markdownlint
  dependency-type: direct:development
  update-type: version-update:semver-minor
...
Signed-off-by: dependabot[bot] <support@github.com>