wrong code in SAC

[QinwenLuo]

If raise NotImplementedError, just modify the functions title of NormalizedActions class, modify _action to aciton and _reverse_action to reverse_action.

[z111222333]

如果引发 NotImplementedError，只需修改 NormalizedActions 类的函数标题，将 _action修改为 aciton 并将 _reverse_action 修改为 reverse_acton。

Thank you very much!