Bump astro from 6.1.9 to 6.4.6

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 6.1.9 to 6.4.6.
- [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@6.4.6/packages/astro)

---
updated-dependencies:
- dependency-name: astro
  dependency-version: 6.4.6
  dependency-type: direct:production
...

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

package.json

@@ -19,7 +19,7 @@
     "@lucide/astro": "^0.552.0",
     "@tailwindcss/vite": "^4.2.4",
     "@types/bun": "^1.3.13",
-    "astro": "6.1.9",
+    "astro": "6.4.6",
     "daisyui": "^5.5.19",
 "node-html-parser": "^7.1.0",
     "svelte": "^5.55.5",