Update README.md

Author: qubvel

README.md

@@ -37,7 +37,7 @@ Change number of output classes in the model:
 model = smp.Unet('resnet34', classes=3, activation='softmax')
 ```
 
-As all models have pretrained weights, so you have to prepare your data the same way as during weights pretraining:
+All models have pretrained encoders, so you have to prepare your data the same way as during weights pretraining:
 ```python
 from segmentation_models_pytorch.encoders import get_preprocessing_fn