update .mailmap

Signed-off-by: Gilles Gouaillardet <gilles@rist.or.jp>
(cherry picked from commit f186076)

Author: ggouaillardet

.mailmap

@@ -117,3 +117,5 @@ Harumi Kuno <harumi.kuno@hpe.com>
 Nick Papior <nickpapior@gmail.com>
 Nick Papior <nickpapior@gmail.com> <nicpa@dtu.dk>
 Nick Papior <nickpapior@gmail.com> <zerothi@users.noreply.github.com>
+
+Wei-keng Liao <wkliao@users.noreply.github.com>