Bump @astrojs/starlight from 0.34.2 to 0.34.3

Bumps [@astrojs/starlight](https://github.com/withastro/starlight/tree/HEAD/packages/starlight) from 0.34.2 to 0.34.3.
- [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/starlight@0.34.3/packages/starlight)

---
updated-dependencies:
- dependency-name: "@astrojs/starlight"
  dependency-version: 0.34.3
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package-lock.json

@@ -39,7 +39,7 @@
     "rescript": "^12.0.0-alpha.9"
   },
   "devDependencies": {
-    "@astrojs/starlight": "0.34.2",
+    "@astrojs/starlight": "0.34.3",
     "astro": "^5.1.1",
     "micromark": "^4.0.1",
     "prettier": "^3.3.3",