eval alignment in train config

[Zjj-Low-Key]

when the output is disparity, in training config like config/main_paper/sd21_train_genpercept_exr_1card_ensure_disparity_bs4_per_accu_768_pixel_mse_ssi_grad_loss.yaml, the alignment is least_sqaure.
Is it an error? Maybe least_square_disparity is correct.