Update C++ torch::nn parity table for LayerNorm (#28484)
Summary:
Since now we have merged https://github.com/pytorch/pytorch/pull/28032 (thanks anjali411!)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/28484
Differential Revision: D18085844
Pulled By: yf225
fbshipit-source-id: 4be972687addea8f57f48dfe9707837196593062
