meta: add Aviv Keller to .mailmap

Signed-off-by: Aviv Keller <me@aviv.sh>
PR-URL: #65048
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Filip Skokan <panva.ip@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>

Author: avivkeller

.mailmap

@@ -55,6 +55,7 @@ Ashok Suthar <coderatlabs@gmail.com>
 Ashutosh Kumar Singh <singhjug1994@gmail.com>
 Atsuo Fukaya <fukayatsu@gmail.com>
 Austin Kelleher <austinlkelleher@gmail.com> <austin.kell47@gmail.com>
+Aviv Keller <me@aviv.sh>
 Azard <azardf4yy@gmail.com> <330815461@qq.com>
 Ben Lugavere <b.lugavere@gmail.com>
 Ben Noordhuis <info@bnoordhuis.nl> <ben@strongloop.com>