chore(deps): update dependency zod to v4

Author: renovate[bot]

package.json

@@ -30,7 +30,7 @@
     "posthog-js": "^1.236.7",
     "submitjson": "^0.11.0",
     "ufo": "^1.6.1",
-    "zod": "^3.24.3"
+    "zod": "^4.0.17"
   },
   "devDependencies": {
     "@iconify-json/vscode-icons": "^1.2.20",