fix(deps): update dependency @astrojs/starlight-tailwind to v5

Author: renovate[bot]

package.json

@@ -26,7 +26,7 @@
   "dependencies": {
     "@astrojs/check": "0.9.9",
     "@astrojs/starlight": "0.37.7",
-    "@astrojs/starlight-tailwind": "4.0.2",
+    "@astrojs/starlight-tailwind": "5.0.0",
     "@tailwindcss/vite": "4.2.4",
     "astro": "5.18.1",
     "starlight-links-validator": "0.19.2",