Bump @astrojs/tailwind from 5.1.5 to 6.0.0 in /apps/website

Bumps [@astrojs/tailwind](https://github.com/withastro/astro/tree/HEAD/packages/integrations/tailwind) from 5.1.5 to 6.0.0.
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/main/packages/integrations/tailwind/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/@astrojs/tailwind@6.0.0/packages/integrations/tailwind)

---
updated-dependencies:
- dependency-name: "@astrojs/tailwind"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

apps/website/package.json

@@ -5,7 +5,7 @@
   "dependencies": {
     "@astrojs/react": "^4.1.2",
     "@astrojs/rss": "^4.0.11",
-    "@astrojs/tailwind": "^5.1.4",
+    "@astrojs/tailwind": "^6.0.0",
     "@astrojs/vercel": "^8.0.1",
     "@crocoder-dev/tailwind": "*",
     "astro": "5.1.2",