Translate src/i18n/sip_i18n.properties in zh_CN

100% translated source file: 'src/i18n/sip_i18n.properties'
on 'zh_CN'.

src/i18n/sip_i18n_zh_CN.properties

@@ -102,7 +102,7 @@ sip.account.enabled = 已启用
 sip.account.promptCredentials = 提示用户输入凭据
 
 #WrongUser, WrongPass, NetworkError, Timeout, Forbidden, WrongAuthUser
-sip.test.error.wronguser= Check SIP username and try again.
+sip.test.error.wronguser= 请检查 SIP 用户名，然后重试。
 sip.test.error.wronpass= Check the password and try again.
 sip.test.error.networkerror= Check the Registrar Address, and if there is a firewall blocking OpenFire Server to reach SIP Registrar Address.
 sip.test.error.timeout= Attempt timeout, please try again.