fix(deps): update dependency zod to v4

Author: renovate[bot]

package.json

@@ -30,7 +30,7 @@
     "react-social-icons": "6.24.0",
     "sanity": "3.99.0",
     "styled-components": "6.1.19",
-    "zod": "3.25.76"
+    "zod": "4.0.11"
   },
   "devDependencies": {
     "@types/eslint": "8.56.12",