[Docs Site] Bump @astrojs/starlight from 0.28.3 to 0.28.6

Bumps [@astrojs/starlight](https://github.com/withastro/starlight/tree/HEAD/packages/starlight) from 0.28.3 to 0.28.6.
- [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/[email protected]/packages/starlight)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -25,7 +25,7 @@
 		"@astrojs/react": "^3.6.2",
 		"@astrojs/rss": "^4.0.9",
 		"@astrojs/sitemap": "^3.2.1",
-		"@astrojs/starlight": "^0.28.3",
+		"@astrojs/starlight": "^0.28.6",
 		"@astrojs/starlight-docsearch": "^0.2.0",
 		"@astrojs/starlight-tailwind": "^2.0.3",
 		"@astrojs/tailwind": "^5.1.2",