Docs/zh_CN: update Alex Shi new email address

I am leaving Alibaba, udpate the old email address to new one.

Signed-off-by: Alex Shi <alex.shi@linux.alibaba.com>
Cc: Harry Wei <harryxiyou@gmail.com>
Cc: Alex Shi <alexs@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Link: https://lore.kernel.org/r/1616748571-52058-2-git-send-email-alex.shi@linux.alibaba.com


Signed-off-by: Jonathan Corbet <corbet@lwn.net>