mailmap: update email address for Triplex

triplex@zh-kernel.org and zhongyu@18mail.cn is absolete email address
for TripleX Chung <xxx.phy@gmail.com>

Signed-off-by: Alex Shi <alex.shi@linux.alibaba.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: TripleX Chung <xxx.phy@gmail.com>
Signed-off-by: Weiwei Jia <harryxiyou@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>