chore(deps): update vitest monorepo to v4

Author: renovate[bot]

package.json

@@ -118,7 +118,7 @@
   },
   "devDependencies": {
     "@types/node": "^24.3.0",
-    "@vitest/coverage-v8": "^3.2.4",
+    "@vitest/coverage-v8": "^4.0.5",
     "abort-controller": "^3.0.0",
     "agent-base": "^7.1.4",
     "changelogen": "^0.6.2",
@@ -132,7 +132,7 @@
     "typescript": "^5.9.2",
     "unbuild": "^3.6.1",
     "undici": "^6.21.3",
-    "vitest": "^3.2.4"
+    "vitest": "^4.0.5"
   },
   "packageManager": "[email protected]"
 }