docs/zh_CN: add Alex into translator in email-clients

Give the credit/responsiblity to translator Alex.
Also remove the duplicate part of disclaimer.
Signed-off-by: Alex Shi <alex.shi@linux.alibaba.com>
Cc: Harry Wei <harryxiyou@gmail.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/translations/zh_CN/process/email-clients.rst

@@ -4,12 +4,11 @@
 
 :Original: :ref:`Documentation/process/email-clients.rst <email_clients>`
 
-如果想评论或更新本文的内容，请直接联系原文档的维护者。如果你使用英文
-交流有困难的话，也可以向中文版维护者求助。如果本翻译更新不及时或者翻
-译存在问题，请联系中文版维护者::
+译者::
 
         中文版维护者： 贾威威  Harry Wei <harryxiyou@gmail.com>
         中文版翻译者： 贾威威  Harry Wei <harryxiyou@gmail.com>
+                       时奎亮  Alex Shi <alex.shi@linux.alibaba.com>
         中文版校译者： Yinglin Luan <synmyth@gmail.com>
         	       Xiaochen Wang <wangxiaochen0@gmail.com>
                        yaxinsn <yaxinsn@163.com>