build(deps): bump astro (#274)

Bumps the npm_and_yarn group with 1 update in the /www directory: [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro).


Updates `astro` from 6.0.4 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:production
  dependency-group: npm_and_yarn
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

www/package.json

@@ -18,7 +18,7 @@
     "@types/canvas-confetti": "^1.9.0",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
-    "astro": "^6.0.4",
+    "astro": "^6.1.6",
     "canvas-confetti": "^1.9.4",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",