chore(deps-dev): bump markdownlint-cli2 from 0.20.0 to 0.21.0

Bumps [markdownlint-cli2](https://github.com/DavidAnson/markdownlint-cli2) from 0.20.0 to 0.21.0.
- [Changelog](https://github.com/DavidAnson/markdownlint-cli2/blob/main/CHANGELOG.md)
- [Commits](DavidAnson/markdownlint-cli2@v0.20.0...v0.21.0)

---
updated-dependencies:
- dependency-name: markdownlint-cli2
  dependency-version: 0.21.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package-lock.json

@@ -43,7 +43,7 @@
         "yargs": "^18.0.0"
     },
     "devDependencies": {
-        "markdownlint-cli2": "^0.20.0",
+        "markdownlint-cli2": "^0.21.0",
         "yaml": "2.8.2",
         "@hyperjump/json-schema": "^1.17.4",
         "c8": "^10.1.3",