fix(deps): update dependency zod to v4

Author: renovate[bot]

packages/veto/package.json

@@ -45,7 +45,7 @@
     "test": "vitest ./src"
   },
   "dependencies": {
-    "zod": "3.25.76",
+    "zod": "4.3.3",
     "zodex": "0.18.2"
   }
 }