chore(deps): bump @astrojs/starlight in the github-actions group

Bumps the github-actions group with 1 update: [@astrojs/starlight](https://github.com/withastro/starlight/tree/HEAD/packages/starlight).


Updates `@astrojs/starlight` from 0.37.5 to 0.37.6
- [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-version: 0.37.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: github-actions
...

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

Author: dependabot[bot]

package-lock.json

@@ -17,7 +17,7 @@
   },
   "dependencies": {
     "@astrojs/check": "^0.9.6",
-    "@astrojs/starlight": "^0.37.4",
+    "@astrojs/starlight": "^0.37.6",
     "@astrojs/vercel": "^9.0.4",
     "@vercel/analytics": "^1.6.1",
     "astro": "^5.17.1"