Update announcements.json

announcements.json

 [
-    {"id":19,"title":"寒假联合赛~IDuel专场","url":"http://www.duelcn.com/thread-60494-1-1.html","created_at":"2014-01-18T10:34:06+08:00","updated_at":"2014-01-18T10:34:06+08:00"}, 
-    {"id":19,"title":"寒假联合赛~NW专场","url":"https://forum.my-card.in/t/nwbbs/2733","created_at":"2014-01-18T10:34:06+08:00","updated_at":"2014-01-18T10:34:06+08:00"},
-    {"id":9,"title":"OCG新禁限卡表 从2月1日起适用 ","url":"https://forum.my-card.in/t/ocg-2014-2-1/2720","created_at":"2014-01-27T10:34:06+08:00","updated_at":"2014-03-27T10:34:06+08:00"},
+    {"id":19,"title":"更新808新卡","url":"https://forum.my-card.in/t/mycard-1-3-5/3040","created_at":"2014-02-18T10:34:06+08:00","updated_at":"2014-02-18T10:34:06+08:00"},
     {"id":18,"title":"游戏王竞赛联盟~周赛","url":"http://www.duelcn.com/thread-59882-1-1.html","created_at":"2013-12-01T18:55:06+08:00","updated_at":"2030-10-22T10:34:06+08:00"},
     {"id":4,"title":"QQ群: Mycard - 萌卡(225669895)","url":"http://qun.qzone.qq.com/group#!/225669895/home","created_at":"2013-02-19T18:12:07+08:00","updated_at":"2013-02-19T07:12:08+08:00"}
 ]