chore(deps): update vitest monorepo to v4

Author: renovate[bot]

package.json

@@ -73,7 +73,7 @@
     "@rslib/core": "^0.15.0",
     "@rspress/plugin-typedoc": "^1.45.6",
     "@types/glob": "^9.0.0",
-    "@vitest/coverage-v8": "^3.0.0",
+    "@vitest/coverage-v8": "^4.0.0",
     "bumpp": "^10.2.0",
     "chalk": "^5.4.1",
     "gh-pages": "^6.3.0",
@@ -86,7 +86,7 @@
     "simple-git-hooks": "^2.9.0",
     "typedoc": "0.28.13",
     "typescript": "5.9.3",
-    "vitest": "^3.0.0"
+    "vitest": "^4.0.0"
   },
   "repository": {
     "type": "git",