Update README.md

Author: cxy1997

README.md

@@ -15,7 +15,7 @@ This repository contains various baseline models for comparison on the *polluted
 `python3 main.py --method Model_Name`
 ### Test a model
 `python3 main.py --method Model_Name --test`
-### Pretrained models
+### Trained models
 Available at [https://drive.google.com/open?id=1jXe2kJJLkhGH8T30juGbyUgsaDQZXISu](https://drive.google.com/open?id=1jXe2kJJLkhGH8T30juGbyUgsaDQZXISu)
 
 ## *Polluted MNIST*