Update README.md

README.md

@@ -21,11 +21,11 @@ Jianhao Shen*, Ye Yuan*, Srbuhi Mirzoyan, Ming Zhang, Chenguang Wang
 ## Dataset Sources
 - **Repository:** https://github.com/stemdataset/STEM
 - **Paper:** https://arxiv.org/abs/2402.17205
-- **Leaderboard:** To be released
+- **Leaderboard:** https://huggingface.co/spaces/stemdataset/stem-leaderboard
 
 ## Dataset Structure
 
-The dataset is splitted into train, valid and test sets. The choice labels in test set are not released and everyone can submit the test set predictions to the [leaderboard](TBR). The basic statistics of the dataset are as follows:
+The dataset is splitted into train, valid and test sets. The choice labels in test set are not released and everyone can submit the test set predictions to the [leaderboard](https://huggingface.co/spaces/stemdataset/stem-leaderboard). The basic statistics of the dataset are as follows:
 
 | Subject     | #Skills | #Questions | Avg. #A    | #Train   | #Valid   | #Test    |
 |-------------|---------|------------|------------|----------|----------|----------|