chore(deps): update devdependency @nuxt/test-utils to v4

Author: renovate[bot]

package.json

@@ -41,7 +41,7 @@
   },
   "devDependencies": {
     "@nuxt/module-builder": "^0.5.1",
-    "@nuxt/test-utils": "^3.7.2",
+    "@nuxt/test-utils": "^4.0.0",
     "@nuxtjs/eslint-config-typescript": "latest",
     "eslint": "^8.49.0",
     "nuxt": "^3.7.2",