fix attention, no depthwise convs by default

change attention keys and values to the module inputs instead of convolution outputs

unet_transformer/unet_transformer_layer.py

@@ -39,7 +39,7 @@ def __init__(
         model_dim=None,
         ffn_hidden=None,
         conv_skip_connection=False,
-        depthwise_conv=True,
+        depthwise_conv=False,
     ):
         super().__init__()