Bump astro from 5.16.5 to 5.16.6

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 5.16.5 to 5.16.6.
- [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@5.16.6/packages/astro)

---
updated-dependencies:
- dependency-name: astro
  dependency-version: 5.16.6
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

package.json

@@ -15,7 +15,7 @@
   },
   "devDependencies": {
     "@astrojs/starlight": "0.37.1",
-    "astro": "5.16.5",
+    "astro": "5.16.6",
     "sharp": "0.34.5",
     "@astrojs/check": "0.9.6",
     "typescript": "5.9.3"