chore(deps): update vitest monorepo to v4

Author: renovate[bot]

package.json

@@ -31,7 +31,7 @@
   },
   "devDependencies": {
     "@types/node": "^24.7.2",
-    "@vitest/coverage-v8": "^3.2.4",
+    "@vitest/coverage-v8": "^4.0.5",
     "changelogen": "^0.6.2",
     "esbuild": "^0.25.10",
     "eslint": "^9.37.0",
@@ -40,7 +40,7 @@
     "rollup": "^4.52.4",
     "typescript": "^5.9.3",
     "unbuild": "^3.6.1",
-    "vitest": "^3.2.4"
+    "vitest": "^4.0.5"
   },
   "packageManager": "pnpm@10.18.2"
 }