fix(deps): update astro monorepo

Author: renovate[bot]

package.json

@@ -23,11 +23,11 @@
   },
   "dependencies": {
     "@astrojs/check": "0.9.4",
-    "@astrojs/cloudflare": "^11.0.5",
+    "@astrojs/cloudflare": "^12.0.0",
     "@astrojs/starlight": "0.27.1",
     "@astrojs/starlight-tailwind": "2.0.3",
-    "@astrojs/tailwind": "5.1.5",
-    "astro": "4.16.18",
+    "@astrojs/tailwind": "6.0.2",
+    "astro": "5.11.0",
     "tailwindcss": "3.4.17",
     "typescript": "5.8.3"
   },