build(deps): bump astro from 5.16.11 to 5.16.15

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 5.16.11 to 5.16.15.
- [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@5.16.15/packages/astro)

---
updated-dependencies:
- dependency-name: astro
  dependency-version: 5.16.15
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package-lock.json

@@ -22,7 +22,7 @@
     "@tailwindcss/vite": "^4.1.12",
     "@types/react": "^19.2.9",
     "@types/react-dom": "^19.2.1",
-    "astro": "^5.16.10",
+    "astro": "^5.16.15",
     "dayjs": "^1.11.13",
     "lodash.kebabcase": "^4.1.1",
     "react": "^19.2.3",