chore(deps): update vitest monorepo to v4.0.16

Author: renovate[bot]

package.json

@@ -23,13 +23,13 @@
   },
   "devDependencies": {
     "@types/node": "24.10.4",
-    "@vitest/coverage-v8": "4.0.15",
+    "@vitest/coverage-v8": "4.0.16",
     "eslint": "9.39.2",
     "eslint-config-matsuri": "5.6.4",
     "prettier": "3.7.4",
     "tsup": "8.5.1",
     "typescript": "^5.6.3",
-    "vitest": "4.0.15"
+    "vitest": "4.0.16"
   },
   "dependencies": {
     "@apidevtools/json-schema-ref-parser": "15.1.3",