[Docs Site] Bump astro from 5.8.0 to 5.9.3 (#23032)

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 5.8.0 to 5.9.3.
- [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: 5.9.3
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package-lock.json

@@ -55,7 +55,7 @@
 		"@types/react-dom": "19.0.4",
 		"@typescript-eslint/parser": "8.33.1",
 		"algoliasearch": "5.27.0",
-		"astro": "5.8.0",
+		"astro": "5.9.3",
 		"astro-breadcrumbs": "3.3.1",
 		"astro-icon": "1.1.5",
 		"astro-live-code": "0.0.6",