added link to UAT version

README.md

@@ -63,6 +63,7 @@ This specific fork was finetuned on SciX Digital Library (https://scixplorer.org
 - **Base Model**: RoBERTa
 - **Tokenizer**: Custom
 - **Parameters**: 125M
+- **UAT Version used**: [5.1](https://github.com/astrothesaurus/UAT/releases/tag/v.5.1.0) 
 
 ## Training Data
 - 18K titles, abstracts, body and acknowledgments from recent, quality astronomy papers