chore(deps): update dependency markdownlint to ^0.29.0 (#220)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [markdownlint](https://togithub.com/DavidAnson/markdownlint) |
[`^0.28.0` ->
`^0.29.0`](https://renovatebot.com/diffs/npm/markdownlint/0.28.2/0.29.0)
|
[![age](https://badges.renovateapi.com/packages/npm/markdownlint/0.29.0/age-slim)](https://docs.renovatebot.com/merge-confidence/)
|
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|
[![passing](https://badges.renovateapi.com/packages/npm/markdownlint/0.29.0/compatibility-slim/0.28.2)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://badges.renovateapi.com/packages/npm/markdownlint/0.29.0/confidence-slim/0.28.2)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>DavidAnson/markdownlint</summary>

###
[`v0.29.0`](https://togithub.com/DavidAnson/markdownlint/blob/HEAD/CHANGELOG.md#&#8203;0290)

[Compare
Source](https://togithub.com/DavidAnson/markdownlint/compare/v0.28.2...v0.29.0)

-   Update `micromark` parser dependencies for better performance
-   Use `micromark` in MD049/MD050
-   Improve MD034/MD037/MD044/MD049/MD050
-   Support multiple parsers in demo page
-   Remove support for end-of-life Node version 14
-   Update dependencies

</details>

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package.json

@@ -73,7 +73,7 @@
 		"jsonc-eslint-parser": "^2.1.0",
 		"knip": "^2.0.0",
 		"lint-staged": "^13.1.0",
-		"markdownlint": "^0.28.0",
+		"markdownlint": "^0.29.0",
 		"markdownlint-cli": "^0.34.0",
 		"npm-package-json-lint": "^6.4.0",
 		"npm-package-json-lint-config-default": "^5.0.0",