build(deps): bump astro from 4.11.5 to 4.16.1 in /docs

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 4.11.5 to 4.16.1.
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/main/packages/astro/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/astro@4.16.1/packages/astro)

---
updated-dependencies:
- dependency-name: astro
  dependency-type: direct:production
...

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

docs/package.json

@@ -12,7 +12,7 @@
   "dependencies": {
     "@astrojs/check": "0.7.0",
     "@astrojs/starlight": "0.24.5",
-    "astro": "4.11.5",
+    "astro": "4.16.1",
     "typescript": "5.5.3"
   }
 }