Update vitest monorepo to v2.1.9

Author: renovate[bot]

package-lock.json

@@ -43,7 +43,7 @@
     "@rollup/plugin-typescript": "12.1.4",
     "@typescript-eslint/eslint-plugin": "8.40.0",
     "@typescript-eslint/parser": "8.40.0",
-    "@vitest/ui": "2.1.8",
+    "@vitest/ui": "2.1.9",
     "eslint": "9.33.0",
     "jest-when": "3.6.0",
     "jsdom": "26.1.0",