Update README-zh_CN.md
Update README-zh_CN.md

An advertised IRC channel 应该翻译成有广告赞助的
In IRC, it's probably best not to dump a long problem description on the channel first thing; some people interpret this as channel-flooding. Best to utter a one-line problem description in a way pitched to start a conversation on the channel. --〉这句话，漏掉翻译了
ryanhanwu/How-To-Ask-Questions-The-Smart-Way