Run markdownlint with reviewdog

Version updated for reviewdog/action-markdownlint to version v0.18.0.

• This action is used across all versions by 22 repositories.

Go to the GitHub Marketplace to find the latest changes.

Release notes

What’s Changed

• chore(deps): update reviewdog to 0.17.4 by @github-actions in https://github.com/reviewdog/action-markdownlint/pull/55
• chore(deps): update markdownlint-cli to 0.40.0 by @github-actions in https://github.com/reviewdog/action-markdownlint/pull/56

Full Changelog: https://github.com/reviewdog/action-markdownlint/compare/v0.17.0...v0.18.0

• reviewdog
• GitHub Actions