Bump @astrojs/tailwind from 5.1.4 to 6.0.0

Bumps [@astrojs/tailwind](https://github.com/withastro/astro/tree/HEAD/packages/integrations/tailwind) from 5.1.4 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]

package.json

@@ -16,7 +16,7 @@
     "@astrojs/mdx": "^4.0.5",
     "@astrojs/react": "^4.2.1",
     "@astrojs/sitemap": "^3.2.1",
-    "@astrojs/tailwind": "^5.1.4",
+    "@astrojs/tailwind": "^6.0.0",
     "@fontsource-variable/inter": "^5.1.1",
     "@tailwindcss/typography": "^0.5.16",
     "@types/react": "^19.0.10",