Bump astro from 5.0.5 to 5.1.1

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 5.0.5 to 5.1.1.
- [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/astro@5.1.1/packages/astro)

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

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

package.json

@@ -17,7 +17,7 @@
 		"@astrojs/sitemap": "3.2.1",
 		"@tammergard/prettier-config": "2.1.0",
 		"@tammergard/tsconfig": "2.8.0",
-		"astro": "5.0.5",
+		"astro": "5.1.1",
 		"preact": "10.25.3",
 		"prettier": "3.4.2",
 		"react": "19.0.0",