.mailmap: add an alias for Tomasz Figa

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/1999>
diff --git a/.mailmap b/.mailmap
index 2fa6af9..1cf3483 100644
--- a/.mailmap
+++ b/.mailmap
@@ -594,6 +594,8 @@
 Tom Stellard <thomas.stellard@amd.com> Thomas Stellard <tom.stellard@amd.com>
 Tom Stellard <thomas.stellard@amd.com> <tstellar@redhat.com>
 
+Tomasz Figa <tfiga@chromium.org> <tomasz.figa@gmail.com>
+
 Tomeu Vizoso <tomeu.vizoso@collabora.com> <tomeu@tomeuvizoso.net>
 
 Tormod Volden <debian.tormod@gmail.com> <lists.tormod@gmail.com>