chore(deps): update devdependency vitest to v4

Author: renovate[bot]

package.json

@@ -126,7 +126,7 @@
     "rehype": "^13.0.2",
     "release-it": "^19.0.5",
     "typescript": "5.9.3",
-    "vitest": "^3.2.4",
+    "vitest": "^4.0.4",
     "vue-tsc": "^3.1.1"
   },
   "resolutions": {