chore(deps): bump astro from 5.15.7 to 5.16.3

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 5.15.7 to 5.16.3.
- [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/astro@5.16.3/packages/astro)

---
updated-dependencies:
- dependency-name: astro
  dependency-version: 5.16.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package.json

@@ -15,7 +15,7 @@
     "@fontsource/geist": "^5.2.8",
     "@fontsource/geist-mono": "^5.2.7",
     "@tailwindcss/vite": "^4.0.7",
-    "astro": "^5.6.1",
+    "astro": "^5.16.3",
     "sharp": "^0.34.2",
     "starlight-openapi": "^0.21.1",
     "tailwindcss": "^4.0.7"