documentation

Pontoon: Update Chinese (zh-CN) localization of Documentation 6.0

Co-authored-by: key_3_feng <key_3_feng@163.com>
Co-authored-by: zhangwenxin.chn <zhangwenxin.chn@outlook.com>
Co-authored-by: Jinjin <zhangjinjin@grandage.cn>
Co-authored-by: zhenglongyang <zhenglongyang@gmail.com>
Co-authored-by: qibowen7192 <qibowen7192@dingtalk.com>
Co-authored-by: 13611874817 <13611874817@163.com>
Co-authored-by: zhaojing <zhaojing@grandage.cn>
Co-authored-by: jodiecc_chen <jodiecc_chen@163.com>
Co-authored-by: 15906677871 <15906677871@139.com>
Co-authored-by: Troy Lu <troy_happy_boy@outlook.com>
Co-authored-by: daemonJerome <daemonJerome@gmail.com>