Update README.md

README.md

@@ -13,7 +13,7 @@ pipeline_tag: text-generation
 
 # Review Generation Model for [Reviewer2](https://arxiv.org/abs/2402.10886)
 
-This is the review generation model ($M_r$) for our Reviewer2 pipeline. A demo of the model is provided in this [repo](https://github.com/ZhaolinGao/Reviewer2/tree/main).
+This is the review generation model (Mr) for our Reviewer2 pipeline. A demo of the model is provided in this [repo](https://github.com/ZhaolinGao/Reviewer2/tree/main).
 
 ## Citation