update model card README.md

README.md

@@ -14,7 +14,7 @@ should probably proofread and complete it, then remove this comment. -->
 
 # t5-qg
 
-This model is a fine-tuned version of [t5-base](https://huggingface.co/t5-base) on the squad_modified_for_t5_qg dataset.
+This model is a fine-tuned version of [t5-small](https://huggingface.co/t5-small) on the squad_modified_for_t5_qg dataset.
 
 ## Model description