[NFC] polish colossalai/nn/layer/colossalai_layer/dropout.py code style (#1568)

colossalai/nn/layer/colossalai_layer/dropout.py

@@ -13,6 +13,7 @@ class Dropout(ColossalaiModule):
         p (float, optional): probability of an element to be zeroed, defaults 0.5.
         inplace (bool, optional): whether to do dropout in-place, default to be False.
     """
+
     def __init__(self, p: float = 0.5, inplace: bool = False) -> None:
         tensor_parallel = get_tensor_parallel_mode()
         if tensor_parallel == "1d":