fix(deps): update dependency zod to v4

Author: renovate[bot]

sample/35-zod-validation/package.json

@@ -25,7 +25,7 @@
     "reflect-metadata": "0.2.2",
     "rimraf": "6.1.3",
     "rxjs": "7.8.2",
-    "zod": "3.25.76"
+    "zod": "4.4.3"
   },
   "devDependencies": {
     "@nestjs/cli": "11.0.24",