更新client.menu.update的文档 (#421)
更新client.menu.update的文档 (#421)

* 更新client.menu.update的文档

* Update wechatpy/client/api/menu.py

Co-Authored-By: ramwin <0b89dd4c6446e4cf65acc3ca9f9bdf5f27a9d4e2@qq.com>

messense/wechatpy,wechatpy/wechatpy,jxtech/wechatpy