.mailmap: specify spelling for Liviu Prodea

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/1999>
diff --git a/.mailmap b/.mailmap
index 86d4c37..0ffb341 100644
--- a/.mailmap
+++ b/.mailmap
@@ -366,6 +366,8 @@
 
 Lionel Landwerlin <lionel.g.landwerlin@intel.com> <llandwerlin@gmail.com>
 
+Liviu Prodea <liviuprodea@yahoo.com>
+
 Lucas Stach <dev@lynxeye.de> <l.stach@pengutronix.de>
 
 Maarten Lankhorst <maarten.lankhorst@ubuntu.com> <dev@mblankhorst.nl>