chore(deps): bump @astrojs/starlight in the npm group

Bumps the npm 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/starlight@0.37.6/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: npm
...

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

Author: dependabot[bot]

package-lock.json

@@ -15,7 +15,7 @@
   },
   "dependencies": {
     "@astrojs/sitemap": "^3.7.0",
-    "@astrojs/starlight": "^0.37.5",
+    "@astrojs/starlight": "^0.37.6",
     "astro": "^5.17.1",
     "sharp": "^0.34.5"
   },