fix(deps): update dependency zod to v4

Author: renovate[bot]

package.json

@@ -37,7 +37,7 @@
     "react": "19.1.0",
     "react-dom": "19.1.0",
     "sonner": "2.0.6",
-    "zod": "3.25.76"
+    "zod": "4.0.5"
   },
   "devDependencies": {
     "@igorkowalczyk/eslint-config": "3.1.0",