chore(deps): bump js-yaml and markdownlint-cli

Bumps [js-yaml](https://github.com/nodeca/js-yaml) to 4.2.0 and updates ancestor dependency [markdownlint-cli](https://github.com/igorshubovych/markdownlint-cli). These dependencies need to be updated together.


Updates `js-yaml` from 4.1.1 to 4.2.0
- [Changelog](https://github.com/nodeca/js-yaml/blob/master/CHANGELOG.md)
- [Commits](https://github.com/nodeca/js-yaml/commits)

Updates `markdownlint-cli` from 0.47.0 to 0.49.0
- [Release notes](https://github.com/igorshubovych/markdownlint-cli/releases)
- [Commits](igorshubovych/markdownlint-cli@v0.47.0...v0.49.0)

---
updated-dependencies:
- dependency-name: js-yaml
  dependency-version: 4.2.0
  dependency-type: indirect
- dependency-name: markdownlint-cli
  dependency-version: 0.49.0
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]