Update README.md

README.md

@@ -30,7 +30,7 @@ pip install promcse
 After installing the package, you can load our model by two lines of code
 ```python
 from promcse import PromCSE
-model = PromCSE("hellonlp/promcse-roberta-base-zh", "cls", 10)
+model = PromCSE("hellonlp/promcse-bert-base-zh", "cls", 10)
 ```
 
 Then you can use our model for encoding sentences into embeddings