Update 'Class_Diagram'

Class_Diagram.md

@@ -159,7 +159,7 @@ package Model <<Frame>> #bada55 {
       /+DiceGroupManager: IManager<DiceGroup>
       /+GameManager: IManager<Game>
       {static} +PlayGame(game: Game)
-      +StartNewGame(name: string, players: IManager<Player>, dice: [*] Die): Game
+      +StartNewGame(name..., players..., dice...): Game
     }
     
   }