fix(deps): update astro monorepo

Author: renovate[bot]

package.json

@@ -17,9 +17,9 @@
   },
   "dependencies": {
     "@astrojs/check": "0.9.6",
-    "@astrojs/cloudflare": "12.6.12",
+    "@astrojs/cloudflare": "13.1.3",
     "@astrojs/starlight": "0.34.8",
-    "astro": "5.16.13",
+    "astro": "6.0.8",
     "semver": "7.7.2",
     "sharp": "0.34.2",
     "starlight-package-managers": "0.11.0",