chore(deps): update peerdependency zod to v4

Author: renovate[bot]

package.json

@@ -61,7 +61,7 @@
     "test:attw": "attw --pack"
   },
   "peerDependencies": {
-    "zod": ">=3"
+    "zod": ">=4.3.6"
   },
   "peerDependenciesMeta": {
     "zod": {