chore(deps): bump astro from 5.15.3 to 5.15.4

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 5.15.3 to 5.15.4.
- [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: 5.15.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package.json

@@ -12,7 +12,7 @@
 	"dependencies": {
 		"@astrojs/check": "^0.9.4",
 		"@astrojs/starlight": "^0.36.0",
-		"astro": "^5.14.3",
+		"astro": "^5.15.5",
 		"mdast-util-to-string": "^4.0.0",
 		"sharp": "^0.32.6",
 		"shiki": "^1.29.2",