chore: update zod version to 4.1.8 in package.json and bun.lock

Author: wangzuo

bun.lock

@@ -37,7 +37,7 @@
   },
   "peerDependencies": {
     "typescript": "^5.0.0",
-    "zod": "^4.0.0-beta.20250418T202744"
+    "zod": "^4.1.8"
   },
   "license": "Apache-2.0",
   "repository": {