Update leaderboard

Author: lizekai-richard

README.md

@@ -13,7 +13,7 @@
 Fair and benchmark for dataset distillation.
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-| <a href="https://nus-hpc-ai-lab.github.io/DD-Ranking/"><b>Documentation</b></a> | <a href="https://nus-hpc-ai-lab.github.io/DD-Ranking/"><b>Leaderboard</b></a> | <b>Paper </b> (Coming Soon) | <a href=""><b>Twitter/X</b></a> | <a href=""><b>Developer Slack</b></a> |
+| <a href="https://nus-hpc-ai-lab.github.io/DD-Ranking/"><b>Documentation</b></a> | <a href="https://huggingface.co/spaces/Soptq/DD-Ranking"><b>Leaderboard</b></a> | <b>Paper </b> (Coming Soon) | <a href=""><b>Twitter/X</b></a> | <a href=""><b>Developer Slack</b></a> |
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