Prints round end information about `rewards`.

def _render_round_end(self, rewards: np.array) -> None:
        '''Prints round end information about `rewards`.'''
        print("*********************************************************")
        print(">>> ROUND END")
        print("*********************************************************")
        total_reward = np.sum(rewards)
        print("==> Objective value = {}".format(total_reward))
        print("==> rewards = {}".format(list(rewards)))
        print()