Update README.md

README.md

@@ -33,7 +33,7 @@ If you use any of these resources (datasets or models) in your work, please cite
 
 ## Model and tokenization
 This model is a [RoBERTa-based](https://github.com/pytorch/fairseq/tree/master/examples/roberta) model trained on a
-biomedical-clinical corpus collected from several sources (see next section).
+**biomedical-clinical** corpus collected from several sources (see next section).
 
 ## Training corpora and preprocessing