Update README.md

Author: mingukkang

README.md

@@ -10,7 +10,7 @@
 - Extensive GAN implementations for Pytorch
 - Comprehensive benchmark of GANs using CIFAR10, Tiny ImageNet, and ImageNet datasets (being updated)
 - Better performance and lower memory consumption than original implementations
-- Providing pre-trained models that is fully compatible with up-to-date PyTorch environment
+- Providing pre-trained models that are fully compatible with up-to-date PyTorch environment
 - Support Multi-GPU(both DP and DDP), Mixed precision, Synchronized Batch Normalization, and Tensorboard Visualization
 
 ##  Implemented GANs