chore(deps): update vitest monorepo to v4

Author: renovate[bot]

libs/angular-ecmascript-intl/package.json

@@ -32,12 +32,12 @@
     "@angular/common": "20.3.7",
     "@angular/core": "20.3.7",
     "@angular/platform-browser": "20.3.7",
-    "@vitest/coverage-v8": "^3.1.3",
+    "@vitest/coverage-v8": "^4.0.0",
     "cpy-cli": "^6.0.0",
     "dayjs": "^1.11.13",
     "jsdom": "^27.0.0",
     "ng-packagr": "20.3.0",
-    "vitest": "^3.1.3"
+    "vitest": "^4.0.0"
   },
   "sideEffects": false,
   "author": {