build(deps): bump astro from 5.16.15 to 5.16.16 in /website (#5039)

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 5.16.15 to 5.16.16.
- [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/[email protected]/packages/astro)

---
updated-dependencies:
- dependency-name: astro
  dependency-version: 5.16.16
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

website/package-lock.json

@@ -20,7 +20,7 @@
     "@docsearch/css": "^4.5.3",
     "@docsearch/js": "^4.5.3",
     "@tailwindcss/vite": "^4.1.8",
-    "astro": "^5.16.15",
+    "astro": "^5.16.16",
     "hastscript": "^9.0.1",
     "marked": "^17.0.1",
     "react": "^19.1.0",