chore(deps): bump markdownlint-cli2 in the minor-and-patch group (#121)

Bumps the minor-and-patch group with 1 update: [markdownlint-cli2](https://github.com/DavidAnson/markdownlint-cli2).


Updates `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
  dependency-group: minor-and-patch
...

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Author: dependabot[bot]

package-lock.json

@@ -61,7 +61,7 @@
     "jest": "^29.7.0",
     "jest-junit": "^16.0.0",
     "lint-staged": "^16.2.7",
-    "markdownlint-cli2": "^0.20.0",
+    "markdownlint-cli2": "^0.21.0",
     "prettier": "^3.5.3",
     "shx": "^0.4.0",
     "ts-jest": "^29.2.6",