chore(deps): update vitest monorepo to v4

Author: renovate[bot]

package.json

@@ -59,7 +59,7 @@
     "@types/babel__core": "7.20.5",
     "@types/eslint-config-prettier": "6.11.3",
     "@types/eslint__js": "9.14.0",
-    "@vitest/coverage-v8": "3.2.4",
+    "@vitest/coverage-v8": "4.0.18",
     "commitizen": "4.3.1",
     "cz-conventional-changelog": "3.3.0",
     "eslint": "10.0.0",
@@ -71,6 +71,6 @@
     "prettier": "3.8.1",
     "typescript": "5.9.3",
     "typescript-eslint": "8.55.0",
-    "vitest": "3.2.4"
+    "vitest": "4.0.18"
   }
 }