Incorrect positional embedding in Stage II.

[Roller44]

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As shown in the figure above, the authors claimed they adopted the sinusoidal positional embedding in their project. However, as shown in the code below, they use "nn.Parameter" instead.

https://github.com/sczhou/CodeFormer/blob/8392d0334956108ab53d9439c4b9fc9c4af0d66d/basicsr/archs/codeformer_arch.py#L182