Bump astro from 5.14.1 to 6.3.1

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 5.14.1 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-major
...

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

Author: dependabot[bot]

apps/docs/package.json

@@ -33,7 +33,7 @@
     "@expressive-code/plugin-line-numbers": "^0.41.3",
     "@tailwindcss/vite": "^4.1.16",
     "@yeskunall/astro-umami": "~0.0.7",
-    "astro": "^5.6.1",
+    "astro": "^6.3.1",
     "elkjs": "^0.10.0",
     "html-to-image": "1.11.11",
     "ng-diagram": "workspace:*",