Updated to show current working unity version.

README.md

 *If you use this for hackweek, please give us feedback @jacob.lorentzen or @nathaniel.buck*
 
 
-# Lobby Rooms  
+# Lobby Rooms 
+## Unity 2021.2a15
+
 
 A Unity Project Sample showing how to integrate Rooms and Relay into a typical Lobby experience use case.