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6f2b310a - [UNet_Spatio_Temporal_Condition] fix default num_attention_heads in unet_spatio_temporal_condition (#7205)

[UNet_Spatio_Temporal_Condition] fix default num_attention_heads in unet_spatio_temporal_condition (#7205) fix default num_attention_heads in unet_spatio_temporal_condition Co-authored-by: Sayak Paul <spsayakpaul@gmail.com>