fix readme typos

README.md

@@ -22,7 +22,7 @@
 
 # Zen-NAS: A Zero-Shot NAS for High-Performance Deep Image Recognition
 
-Zen-NAS is a lighting fast, training-free Neural Architecture Searching (NAS) algorithm for automatically designing deep neural networks with high prediction accuracy and high inference speed on GPU and mobile device. 
+Zen-NAS is a lightning fast, training-free Neural Architecture Searching (NAS) algorithm for automatically designing deep neural networks with high prediction accuracy and high inference speed on GPU and mobile device. 
 
 This repository contains pre-trained models, a mini framework for zero-shot NAS searching, and scripts to reproduce our results. You can even customize your own search space and develop a new zero-shot NAS proxy using our pipeline. Contributions are welcomed.
 
@@ -227,4 +227,4 @@ https://pytorch.org/vision/0.8/_modules/torchvision/models/resnet.html
 
 ## Copyright
 
-Copyright (C) 2010-2021 Alibaba Group Holding Limited.
+Copyright (C) 2010-2021 Alibaba Group Holding Limited.