Update model name in readme.

README.md

@@ -15,7 +15,7 @@ Model included in a paper for modeling fine grained similarity between documents
 
 **Github**: https://github.com/allenai/aspire 
 
-**Note**: In the context of the paper, this model is referred to as `tsAspire` and represents the papers proposed multi-vector model for fine-grained scientific document similarity.
+**Note**: In the context of the paper, this model is referred to as `otAspire` and represents the papers proposed multi-vector model for fine-grained scientific document similarity.
 
 ## Model Card