deps: bump astro from 5.2.5 to 5.5.5

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 5.2.5 to 5.5.5.
- [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/[email protected]/packages/astro)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package.json

@@ -22,7 +22,7 @@
   },
   "dependencies": {
     "@astrojs/starlight": "0.31.1",
-    "astro": "5.2.5",
+    "astro": "5.5.5",
     "sharp": "0.33.5"
   },
   "devDependencies": {