Add link to paper

This PR ensures the model is linked to https://huggingface.co/papers/2410.08208.

README.md

@@ -36,7 +36,7 @@ covering 268 tasks across 8 simulators with diverse policies in both single-task
 <!-- Provide the basic links for the model. -->
 
 - **Repository:** [https://github.com/HaoyiZhu/SPA](https://github.com/HaoyiZhu/SPA)
-- **Paper:** [Arxiv (Coming Soon)]()
+- **Paper:** [Hugging Face paper page](https://huggingface.co/papers/2410.08208)
 - **Project Page:** [https://haoyizhu.github.io/spa/](https://haoyizhu.github.io/spa/)
 
 ## Citation