chore(deps): update dependency vitest to v4

Author: renovate[bot]

package.json

@@ -57,7 +57,7 @@
     "nitropack": "^2.10.4",
     "nuxt": "^3.15.2",
     "nuxt-applicationinsights": "link:./",
-    "vitest": "^3.0.0",
+    "vitest": "^4.0.0",
     "vue-tsc": "^3.0.0"
   },
   "packageManager": "pnpm@9.15.4",