fix(deps): update nuxtjs monorepo to v4

Author: renovate[bot]

packages/docs/package.json

@@ -20,7 +20,7 @@
     "@nuxtjs/mdc": "0.20.1",
     "@unocss/nuxt": "66.6.0",
     "gh-pages": "6.3.0",
-    "nuxt": "3.21.0",
+    "nuxt": "4.3.1",
     "vitest": "3.2.4",
     "zx": "8.8.5"
   }

packages/playground-nuxt/package.json

@@ -13,7 +13,7 @@
     "vue-recaptcha": "workspace:^"
   },
   "devDependencies": {
-    "nuxt": "3.21.0",
+    "nuxt": "4.3.1",
     "vue": "3.5.27",
     "vue-router": "4.6.4"
   }

packages/vue-recaptcha/package.json

@@ -56,8 +56,8 @@
     }
   },
   "dependencies": {
-    "@nuxt/kit": "^3.9.1",
-    "@nuxt/schema": "^3.9.1",
+    "@nuxt/kit": "^4.0.0",
+    "@nuxt/schema": "^4.0.0",
     "@vueuse/shared": "^14.0.0",
     "defu": "^6.1.4",
     "p-defer": "^4.0.1",