Change reference

main.py

@@ -30,7 +30,7 @@ to the leaderboard. We require method to have public code available to be consid
 CITATION_BUTTON_LABEL = "If you use this leaderboard in your research please cite the following:"
 CITATION_BUTTON_TEXT = r"""
 @article{
-TODO update when arxiv version is ready,
+TBA,
 }
 """