fix(renovate): Update dependency vitest to v4

Author: renovate[bot]

package.json

@@ -96,7 +96,7 @@
         "typescript": "5.9.3",
         "typescript-eslint": "8.44.1",
         "vite": "6.3.7",
-        "vitest": "3.2.4"
+        "vitest": "4.0.8"
     },
     "peerDependencies": {
         "@typescript-eslint/parser": "^7.0.0 || ^8.0.0",