Update README.md

README.md

@@ -10,6 +10,7 @@ Through HuggingFace Optimum, Graphcore released ready-to-use IPU-trained model c
 
 
 ## Model description
+(source: https://huggingface.co/sentence-transformers/sentence-t5-base)
 
 Sentence-t5 is a sentence-transformers model: It maps sentences & paragraphs to a 768 dimensional dense vector space. The model works well for sentence similarity tasks, but doesn't perform that well for semantic search tasks.