Bump astro from 4.15.1 to 4.15.9

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 4.15.1 to 4.15.9.
- [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@4.15.9/packages/astro)

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

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

package.json

@@ -29,7 +29,7 @@
     "@preline/tabs": "^2.4.1",
     "@types/react": "^18.3.3",
     "@types/react-dom": "^18.3.0",
-    "astro": "^4.15.1",
+    "astro": "^4.15.9",
     "astro-compressor": "^0.4.1",
     "clipboard": "^2.0.11",
     "globby": "^14.0.2",