.mailmap: add an alias for Andrii Simiklit

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/1999>
diff --git a/.mailmap b/.mailmap
index aff1ebb..cf7c284 100644
--- a/.mailmap
+++ b/.mailmap
@@ -54,6 +54,8 @@
 Andrew Randrianasulu <randrianasulu@gmail.com> <randrik_a@yahoo.com>
 Andrew Randrianasulu <randrianasulu@gmail.com> <randrik@mail.ru>
 
+Andrii Simiklit <andrii.simiklit@globallogic.com> <asimiklit.work@gmail.com>
+
 Arthur Huillet <arthur.huillet@free.fr> Arthur HUILLET <arthur.huillet@free.fr>
 
 Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl> <basni@chromium.org>