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

Author: renovate[bot]

package.json

@@ -59,7 +59,7 @@
     "@nuxt/eslint": "^1.9.0",
     "@nuxt/eslint-config": "^1.9.0",
     "@nuxt/module-builder": "^1.0.2",
-    "@nuxt/test-utils": "^3.19.2",
+    "@nuxt/test-utils": "^4.0.0",
     "changelogen": "^0.6.2",
     "eslint": "^9.34.0",
     "happy-dom": "^18.0.1",