Added link for Roberta model to readme

README.md

@@ -23,7 +23,7 @@ We plan on also publishing the other fine-tuned models as well as the base model
 | base_10     | ALBERT           | MathSE (1)                 | yes, N=10 MathSE                    |      |
 | math_10_add | ALBERT           | MathSE (1)-(3)             | yes, N=10 MathSE and annotated data |      |
 | Khan_SE_10  | ALBERT           | MathSE (1)                 | yes, N=10 MathSE                    |      |
-| roberta     | RoBERTa          | MathSE (1)                 | no                                  |      |
+| roberta     | RoBERTa          | MathSE (1)                 | no                                  | [AnReu/math_pretrained_roberta](https://huggingface.co/AnReu/math_pretrained_roberta)     |
 | math albert | ALBERT           | MathSE (1)-(3)             | no                                  | [AnReu/math_albert](https://huggingface.co/AnReu/math_albert) |
 | base        | ALBERT           | MathSE (1)                 | no                                  |      |
 | Khan_SE     | ALBERT           | MathSE (1) mixed with Khan | no                                  |      |