build(deps): bump markdown-it and markdownlint-cli2 in /docs (#8329)

Bumps [markdown-it](https://github.com/markdown-it/markdown-it) to 14.1.1 and updates ancestor dependency [markdownlint-cli2](https://github.com/DavidAnson/markdownlint-cli2). These dependencies need to be updated together.


Updates `markdown-it` from 14.1.0 to 14.1.1
- [Changelog](https://github.com/markdown-it/markdown-it/blob/master/CHANGELOG.md)
- [Commits](markdown-it/markdown-it@14.1.0...14.1.1)

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: markdown-it
  dependency-version: 14.1.1
  dependency-type: indirect
- dependency-name: markdownlint-cli2
  dependency-version: 0.21.0
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

docs/package-lock.json

@@ -20,7 +20,7 @@
     "@mermaid-js/layout-elk": "^0.1.9",
     "eslint": "^9.39.2",
     "glob": "^11.0.3",
-    "markdownlint-cli2": "^0.20.0",
+    "markdownlint-cli2": "^0.21.0",
     "md-front-matter": "^1.0.4",
     "raw-loader": "^4.0.2",
     "react-markdown": "^10.1.0",