Bump astro from 1.2.1 to 4.16.18 in /docs

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 1.2.1 to 4.16.18.
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/main/packages/astro/CHANGELOG-v1.md)
- [Commits](https://github.com/withastro/astro/commits/astro@4.16.18/packages/astro)

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

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

docs/package.json

@@ -24,7 +24,7 @@
     "@types/node": "^18.0.0",
     "@types/react": "^17.0.45",
     "@types/react-dom": "^18.0.0",
-    "astro": "^1.2.1",
+    "astro": "^4.16.18",
     "preact": "^10.7.3",
     "react": "^18.1.0",
     "react-dom": "^18.1.0",