.mailmap: add an alias for Illia Iorin

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/1999>
diff --git a/.mailmap b/.mailmap
index dd741ef..6f7c73b 100644
--- a/.mailmap
+++ b/.mailmap
@@ -252,6 +252,8 @@
 
 Igor Gnatenko <i.gnatenko.brain@gmail.com> <ignatenko@redhat.com>
 
+Illia Iorin <illia.iorin@globallogic.com> <illia.iorin@gmail.com>
+
 Jakob Bornecrantz <wallbraker@gmail.com> <jakob@vmware.com>
 Jakob Bornecrantz <wallbraker@gmail.com> <jakob@aurora.(none)>
 Jakob Bornecrantz <wallbraker@gmail.com> <jakob@aurora.walkyrie.se>