Update Welcome Messages.json

(17:11:56) Chinchou joined the channel.
(17:11:57) Magnemite: こんにちは {{user]}, ドックへようこそ！私たちは、あなたの滞在をお楽しみください！^_^
(17:12:10) Chinchou: well
(17:12:13) Chinchou: Magnemite
(17:12:13) Magnemite: Chinchou's got that one thing! 
(17:12:18) Chinchou: I think
(17:12:27) Chinchou: I am noy
(17:12:29) Chinchou: not
(17:12:36) Chinchou: {{user}}