[Docs Site] Bump @astrojs/starlight from 0.29.2 to 0.29.3 (#18741)

Bumps [@astrojs/starlight](https://github.com/withastro/starlight/tree/HEAD/packages/starlight) from 0.29.2 to 0.29.3.
- [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]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -30,7 +30,7 @@
 		"@astrojs/react": "^3.6.3",
 		"@astrojs/rss": "^4.0.10",
 		"@astrojs/sitemap": "^3.2.1",
-		"@astrojs/starlight": "^0.29.2",
+		"@astrojs/starlight": "^0.29.3",
 		"@astrojs/starlight-docsearch": "^0.3.0",
 		"@astrojs/starlight-tailwind": "^2.0.3",
 		"@astrojs/tailwind": "^5.1.3",