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

Author: renovate[bot]

package.json

@@ -128,7 +128,7 @@
     "@nuxt/kit": "^4.0.0",
     "@nuxt/module-builder": "^1.0.2",
     "@nuxt/schema": "^4.0.0",
-    "@nuxt/test-utils": "^3.19.2",
+    "@nuxt/test-utils": "^4.0.0",
     "@nuxt/vite-builder": "^4.2.0",
     "@types/bcrypt": "^6.0.0",
     "@types/node": "^25.0.3",