Update vitest monorepo to v4

Author: renovate[bot]

package.json

@@ -118,7 +118,7 @@
     "@release-it-plugins/lerna-changelog": "8.0.1",
     "@types/node": "22.17.1",
     "@vitejs/plugin-vue": "6.0.1",
-    "@vitest/coverage-istanbul": "^3.2.4",
+    "@vitest/coverage-istanbul": "^4.0.8",
     "@vue/compiler-sfc": "3.5.18",
     "eslint": "9.33.0",
     "execa": "9.6.0",
@@ -129,7 +129,7 @@
     "tsup": "8.5.0",
     "typescript": "5.9.2",
     "vite": "7.1.2",
-    "vitest": "3.2.4",
+    "vitest": "4.0.8",
     "vue": "3.5.18",
     "vue-loader": "17.4.2",
     "webpack": "5.101.1"