chore(deps): update vitest monorepo to v4

Author: renovate[bot]

package.json

@@ -54,8 +54,8 @@
     "@eslint/js": "^9.39.1",
     "@trivago/prettier-plugin-sort-imports": "^6.0.0",
     "@types/eslint": "^9.6.1",
-    "@vitest/coverage-istanbul": "3.2.4",
-    "@vitest/ui": "3.2.4",
+    "@vitest/coverage-istanbul": "4.0.8",
+    "@vitest/ui": "4.0.8",
     "eslint": "^9.39.1",
     "eslint-config-prettier": "^10.1.8",
     "eslint-plugin-prettier": "^5.5.4",
@@ -67,7 +67,7 @@
     "vite": "^7.2.2",
     "vite-tsconfig-paths": "^5.1.4",
     "vitepress": "1.6.4",
-    "vitest": "3.2.4",
+    "vitest": "4.0.8",
     "wrangler": "^4.46.0"
   },
   "dependencies": {