Update README.md

added paper hyperlink to readme

README.md

@@ -1,5 +1,5 @@
 # Understanding Embodied Reference with Touch-Line Transformer
-Code for ICLR 2023 paper Understanding Embodied Reference with Touch-Line Transformer.\
+Code for ICLR 2023 paper [Understanding Embodied Reference with Touch-Line Transformer](https://openreview.net/pdf?id=ugA1HX69sf).\
 Authors: Yang Li, Xiaoxue Chen, Hao Zhao, Jiangtao Gong, Guyue Zhou, Federico Rossano, Yixin Zhu
 
 ## Project Structure
@@ -191,4 +191,4 @@ setting SAVE_EVALUATION_PREDICTIONS = True and run any of the evaluation command
 We annotated eyes, fingertips, elbows, and wrists. 
 They are under the yourefit folder of this repo. 
 Eye and fingertip locations are stored in csv files. 
-Elbows and wrist locations are stored in a json file. 
+Elbows and wrist locations are stored in a json file.