add dataset to desc

README.md

@@ -193,7 +193,7 @@ Exploring how well long-document models trained on "lay summaries" of scientific
 
 ## Model description
 
-This model is a fine-tuned version of [google/long-t5-tglobal-base](https://huggingface.co/google/long-t5-tglobal-base) on the None dataset.
+This model is a fine-tuned version of [google/long-t5-tglobal-base](https://huggingface.co/google/long-t5-tglobal-base) on the `pszemraj/scientific_lay_summarisation-plos-norm` dataset.
 It achieves the following results on the evaluation set:
 - Loss: 1.6778
 - Rouge1: 49.1475