Bump astro from 4.16.1 to 4.16.18

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 4.16.1 to 4.16.18.
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/astro@4.16.18/packages/astro/CHANGELOG.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-src/package.json

@@ -14,7 +14,7 @@
     "@astrojs/check": "^0.9.3",
     "@astrojs/starlight": "^0.27.1",
     "@astrojs/tailwind": "^5.1.2",
-    "astro": "^4.16.1",
+    "astro": "^4.16.18",
     "sharp": "^0.33.4",
     "shepherd.js": "workspace:*",
     "starlight-typedoc": "^0.16.0",

landing/package.json

@@ -18,7 +18,7 @@
     "@astrojs/tailwind": "^5.1.2",
     "@astrojs/vercel": "^7.8.2",
     "@polar-sh/sdk": "^0.16.0",
-    "astro": "^4.16.1",
+    "astro": "^4.16.18",
     "shepherd.js": "workspace:*",
     "tailwindcss": "^3.4.11",
     "typescript": "^5.6.3"