chore(web): bump astro from 6.2.1 to 6.3.1 in /web in the astro group (#14)

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


Updates `astro` from 6.2.1 to 6.3.1
- [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@6.3.1/packages/astro)

---
updated-dependencies:
- dependency-name: astro
  dependency-version: 6.3.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: astro
...

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

Author: dependabot[bot]

web/package-lock.json

@@ -10,7 +10,7 @@
   },
   "dependencies": {
     "@tailwindcss/postcss": "^4.2.4",
-    "astro": "^6.2.1",
+    "astro": "^6.3.1",
     "marked": "^18.0.3",
     "tailwindcss": "^4.2.4"
   }