Update Tmux_doc_cn.md (#4966)
Update Tmux_doc_cn.md (#4966)

校对中
Yinux/TranslateProject,runningwater/TranslateProject,Flowsnow/TranslateProject,tnuoccalanosrep/TranslateProject,alim0x/TranslateProject,ch-cn/TranslateProject,chunyang-wen/TranslateProject,XLCYun/TranslateProject,bestony/TranslateProject,wcnnbdk1/TranslateProject,name1e5s/TranslateProject,StdioA/TranslateProject,hkurj/TranslateProject,oska874/TranslateProject,geekpi/TranslateProject,Yinr/TranslateProject,fuowang/TranslateProject,LCTT/TranslateProject,FSSlc/TranslateProject,martin2011qi/TranslateProject