chore(deps): bump astro in /website in the dependencies group (#1646)

Bumps the dependencies group in /website with 1 update: [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro).


Updates `astro` from 5.9.0 to 5.9.1
- [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-version: 5.9.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

website/package-lock.json

@@ -25,7 +25,7 @@
   },
   "dependencies": {
     "@astrojs/starlight": "^0.34.3",
-    "astro": "^5.9.0",
+    "astro": "^5.9.1",
     "sharp": "^0.34.2"
   },
   "engines": {