Bump astro from 3.6.4 to 4.0.8

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 3.6.4 to 4.0.8.
- [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@4.0.8/packages/astro)

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

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

package.json

@@ -13,7 +13,7 @@
   "dependencies": {
     "@astrojs/check": "^0.3.4",
     "@astrojs/rss": "^3.0.0",
-    "astro": "^3.6.4",
+    "astro": "^4.0.8",
     "typescript": "^5.3.2"
   }
 }