Update 'Class_Diagram'

Class_Diagram.md

@@ -137,7 +137,7 @@ package Model <<Frame>> #bada55 {
       /+GlobalPlayerManager: IManager
       /+GlobalDieManager: IManager
       {static} +PlayGame(game: Game)
-      +StartNewGame(name: string, pm: PlayerManager, dice: [*] AbstractDie): Game
+      +StartNewGame(name: string, players: IManager<Player>, dice: [*] AbstractDie): Game
     }
     
   }