Fixed the missing token normalization for cross-attention computation #82
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For a downstream task, I see better training convergence upon normalizing both x and x_prev during the computation of cross-attention here: https://github.com/apple/ml-cvnets/blob/main/cvnets/modules/transformer.py#L258
Currently, I am conducting model training with and without the proposed normalization of x_prev and will share the results for the two cases. In the meantime, if this change makes sense, kindly include it. Let me know if you need any related info.