!44914 Fix doc error of nn.ChannelShuffle

Merge pull request !44914 from pkuliuliu/code_docs_channel_shuffle

docs/api/api_python/nn/mindspore.nn.ChannelShuffle.rst

@@ -1,7 +1,7 @@
 mindspore.nn.ChannelShuffle
 ============================
 
-.. py:class:: mindspore.nn.ChannelShuffle()
+.. py:class:: mindspore.nn.ChannelShuffle(groups)
 
     将shape的为 :math`(*, C, H, W)` 的Tensor的通道划分成 :math`g` 组，并将其以 :math`(*, C \frac g, g, H, W)` 的shape重新排列, 同时保持Tensor原有的shape。
 

mindspore/python/mindspore/nn/layer/channel_shuffle.py

@@ -36,7 +36,7 @@ class ChannelShuffle(Cell):
         Tensor, with the same type and shape as the `x`.
 
     Raises:
-        TypeError: If groups is not an int.
+        TypeError: If `groups` is not an int.
         ValueError: If `groups` is less than 1.
         ValueError: If dims of `x` is less than 3.
         ValueError: If number of channels can not be divisible by groups.