Add paper link

Hi, congrats on your work OlympicArena!
It would be great to link the dataset with the paper on Daily Papers page to increase visibility.

README.md

@@ -1,4 +1,5 @@
 ---
+Paper: arxiv.org/abs/2406.16772
 license: cc-by-nc-sa-4.0
 dataset_info:
 - config_name: Math