add page link

add hyperlink to the arXiv page

README.md

@@ -458,6 +458,9 @@ COLO(
 
 ## Citation
 
+
+[The page of the arXiv article](https://arxiv.org/abs/2407.20372)
+
 ```bibtex
 @misc{das2024model,
     title={A Model Generalization Study in Localizing Indoor Cows with COw LOcalization (COLO) dataset},