Bump @astrojs/starlight-tailwind from 4.0.2 to 5.0.0 in /docs (#905)

Bumps [@astrojs/starlight-tailwind](https://github.com/withastro/starlight/tree/HEAD/packages/tailwind) from 4.0.2 to 5.0.0.
- [Release notes](https://github.com/withastro/starlight/releases)
- [Changelog](https://github.com/withastro/starlight/blob/main/packages/tailwind/CHANGELOG.md)
- [Commits](https://github.com/withastro/starlight/commits/@astrojs/starlight-tailwind@5.0.0/packages/tailwind)

---
updated-dependencies:
- dependency-name: "@astrojs/starlight-tailwind"
  dependency-version: 5.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

docs/package.json

@@ -13,7 +13,7 @@
     "@astrojs/check": "^0.9.6",
     "@astrojs/node": "^10.0.5",
     "@astrojs/starlight": "^0.38.3",
-    "@astrojs/starlight-tailwind": "^4.0.2",
+    "@astrojs/starlight-tailwind": "^5.0.0",
     "@astrojs/svelte": "^8.0.5",
     "@fontsource/ibm-plex-mono": "^5.2.7",
     "@fontsource/ibm-plex-sans": "^5.2.8",