mailmap: Min Chen name normalization

Signed-off-by: M Ranga Swami Reddy <swamireddy@gmail.com>

.mailmap

@@ -159,6 +159,7 @@ Maxime Robert <maxime.robert1992@gmail.com> <maxime.robert1992@gmail.com>
 Michael Riederer <michael@riederer.org> dynamike67 <michael@riederer.org>
 Michael Rodriguez <michael@newdream.net> <michael@newdream.net>
 Michael Rodriguez <michael@newdream.net> <michael@squid.newdream.net>
+Min Chen <minchen@ubuntukylin.com> <minchen@ubuntukylin.com>
 Mingyue Zhao <zhao.mingyue@h3c.com> <zhao.mingyue@h3c.com>
 Mykola Golub <mgolub@mirantis.com> Mykola Golub <mgolub@zhuzha.mirantis.lviv.net>
 Nathan Cutler <ncutler@suse.com> <ncutler@suse.cz>