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

@@ -99,7 +99,7 @@ sip.account.server = 服务器
 sip.account.outboundproxy = 出站代理
 sip.account.voicemail = 语音留言号码
 sip.account.enabled = 已启用
-sip.account.promptCredentials = Prompt user for Credentials
+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.