Adjust zod version (#232)

* Fix CONTRIBUTING.md

* Adjust zod version

Author: eucyt

package-lock.json

@@ -36,7 +36,7 @@
   "dependencies": {
     "@line/bot-sdk": "^10.0.0",
     "@modelcontextprotocol/sdk": "^1.8.0",
-    "zod": "^3.21.4"
+    "zod": "^3.25.76"
   },
   "devDependencies": {
     "@types/node": "^22",