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

@@ -18,7 +18,7 @@ sipark.settings.valid.stunPort=请指定 STUN 服务器端口。
 sipark.settings.table.title = SIP 和 STUN 服务器设置
 sipark.settings.sipServer = SIP 服务器
 sipark.settings.sipServer.description =  指定运行 SIP 服务器的主机名。
-sipark.settings.voiceMail = Voice Mail Number
+sipark.settings.voiceMail = 语音留言号码
 sipark.settings.voiceMail.description =  Specify the number to dial to access the voice mail.
 sipark.settings.enable.stun = STUN server enabled
 sipark.settings.enable.stun.description = Enable this field when you are using a STUN server.