Bump vitest from 3.2.4 to 4.1.8

Bumps [vitest](https://github.com/vitest-dev/vitest/tree/HEAD/packages/vitest) from 3.2.4 to 4.1.8.
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Changelog](https://github.com/vitest-dev/vitest/blob/main/docs/releases.md)
- [Commits](https://github.com/vitest-dev/vitest/commits/v4.1.8/packages/vitest)

---
updated-dependencies:
- dependency-name: vitest
  dependency-version: 4.1.8
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>
Signed-off-by: Sacha Al Himdani <sacha@getprobo.com>

packages/ui/package.json

@@ -67,7 +67,7 @@
     "storybook": "^10.2.10",
     "typescript": "~5.8.3",
     "vite": "^7.3.2",
-    "vitest": "^4.0.18"
+    "vitest": "^4.1.8"
   },
   "peerDependencies": {
     "react": "^19.1.0",