Bump astro from 5.17.3 to 5.18.0

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 5.17.3 to 5.18.0.
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/astro@5.18.0/packages/astro/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/astro@5.18.0/packages/astro)

---
updated-dependencies:
- dependency-name: astro
  dependency-version: 5.18.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

package-lock.json

@@ -10,7 +10,7 @@
       "devDependencies": {
         "@astrojs/check": "0.9.6",
         "@astrojs/starlight": "0.37.6",
-        "astro": "5.17.3",
+        "astro": "5.18.0",
         "sharp": "0.34.5",
         "typescript": "5.9.3"
       }
@@ -2357,9 +2357,9 @@
       }
     },
     "node_modules/astro": {
-      "version": "5.17.3",
-      "resolved": "https://registry.npmjs.org/astro/-/astro-5.17.3.tgz",
-      "integrity": "sha512-69dcfPe8LsHzklwj+hl+vunWUbpMB6pmg35mACjetxbJeUNNys90JaBM8ZiwsPK689SAj/4Zqb1ayaANls9/MA==",
+      "version": "5.18.0",
+      "resolved": "https://registry.npmjs.org/astro/-/astro-5.18.0.tgz",
+      "integrity": "sha512-CHiohwJIS4L0G6/IzE1Fx3dgWqXBCXus/od0eGUfxrZJD2um2pE7ehclMmgL/fXqbU7NfE1Ze2pq34h2QaA6iQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {