chore(deps): update vitest monorepo to v4

Author: renovate[bot]

package.json

@@ -47,7 +47,7 @@
   },
   "devDependencies": {
     "@types/node": "^22.18.8",
-    "@vitest/coverage-v8": "^3.2.4",
+    "@vitest/coverage-v8": "^4.0.8",
     "changelogen": "^0.6.2",
     "esbuild": "^0.25.10",
     "eslint": "^9.37.0",
@@ -56,7 +56,7 @@
     "prettier": "^3.6.2",
     "typescript": "^5.9.3",
     "unbuild": "^3.6.1",
-    "vitest": "^3.2.4",
+    "vitest": "^4.0.8",
     "zeptomatch": "^2.0.2"
   },
   "packageManager": "[email protected]",