Bump @astrojs/starlight from 0.21.5 to 0.22.4 (#2808)

Bumps [@astrojs/starlight](https://github.com/withastro/starlight/tree/HEAD/packages/starlight) from 0.21.5 to 0.22.4.
- [Release notes](https://github.com/withastro/starlight/releases)
- [Changelog](https://github.com/withastro/starlight/blob/main/packages/starlight/CHANGELOG.md)
- [Commits](https://github.com/withastro/starlight/commits/@astrojs/starlight@0.22.4/packages/starlight)

---
updated-dependencies:
- dependency-name: "@astrojs/starlight"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

docs-src/package.json

@@ -11,7 +11,7 @@
   },
   "dependencies": {
     "@astrojs/check": "^0.5.10",
-    "@astrojs/starlight": "^0.21.5",
+    "@astrojs/starlight": "^0.22.4",
     "@astrojs/tailwind": "^5.1.0",
     "astro": "^4.8.4",
     "sharp": "^0.33.3",