chore(deps): update vitest monorepo to v4

Author: renovate[bot]

package.json

@@ -32,7 +32,7 @@
   },
   "devDependencies": {
     "@hapi/bourne": "^3.0.0",
-    "@vitest/coverage-v8": "^3.2.4",
+    "@vitest/coverage-v8": "^4.0.8",
     "changelogen": "^0.6.2",
     "eslint": "^9.38.0",
     "eslint-config-unjs": "^0.5.0",
@@ -41,7 +41,7 @@
     "secure-json-parse": "^4.1.0",
     "typescript": "^5.9.3",
     "unbuild": "~3.6.1",
-    "vitest": "^3.2.4"
+    "vitest": "^4.0.8"
   },
   "packageManager": "pnpm@10.20.0"
 }