Bumps [markdownlint-cli](https://github.com/igorshubovych/markdownlint-cli) from 0.30.0 to 0.31.0.
- [Release notes](https://github.com/igorshubovych/markdownlint-cli/releases)
- [Commits](https://github.com/igorshubovych/markdownlint-cli/compare/v0.30.0...v0.31.0

)

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