Bump @astrojs/starlight from 0.27.1 to 0.28.2

Bumps [@astrojs/starlight](https://github.com/withastro/starlight/tree/HEAD/packages/starlight) from 0.27.1 to 0.28.2.
- [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@0.28.2/packages/starlight)

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

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

package.json

@@ -10,7 +10,7 @@
   },
   "devDependencies": {
     "@astrojs/check": "^0.9.3",
-    "@astrojs/starlight": "^0.27.1",
+    "@astrojs/starlight": "^0.28.2",
     "@playwright/test": "^1.47.1",
     "@splidejs/splide": "^4.1.4",
     "@types/node": "^22.5.5",