meta: add mailmap entry for legendecas

PR-URL: #52795
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Yagiz Nizipli <yagiz.nizipli@sentry.io>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>

Author: legendecas

.mailmap

@@ -98,6 +98,7 @@ Chen Gang <gangc.cxy@foxmail.com>
 Chen Gang <gangc.cxy@foxmail.com> <13298548+MoonBall@users.noreply.github.com>
 Chengzhong Wu <legendecas@gmail.com>
 Chengzhong Wu <legendecas@gmail.com> <chengzhong.wcz@alibaba-inc.com>
+Chengzhong Wu <legendecas@gmail.com> <cwu631@bloomberg.net>
 Chew Choon Keat <choonkeat@gmail.com>
 Chris Andrews <cpandrews8@gmail.com>
 Chris Johnson <chris.s.johnson4@gmail.com>