chore(deps-dev): bump astro from 6.0.8 to 6.1.6 (#4310)

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 6.0.8 to 6.1.6.
- [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@6.1.6/packages/astro)

---
updated-dependencies:
- dependency-name: astro
  dependency-version: 6.1.6
  dependency-type: direct:development
...

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packages/astro/package.json

@@ -59,7 +59,7 @@
     "typescript": "^5.8.3",
     "vite": "^7.3.2",
     "vitest": "^4.1.1",
-    "astro": "^6.0.8"
+    "astro": "^6.1.6"
   },
   "peerDependencies": {
     "astro": "^4 || ^5 || ^6"