update cite

README.md

@@ -185,10 +185,14 @@ We use Best-of-64 as our evaluation metric. The weighting methods are different
 ## Citation
 
 ```latex
-@misc{cui2024process,
-  title={Process Reinforcement through Implicit Rewards},
-  author={Ganqu Cui and Lifan Yuan and Zefan Wang and Hanbin Wang and Wendi Li and Bingxiang He and Yuchen Fan and Tianyu Yu and Qixin Xu and Weize Chen and Jiarui Yuan and Huayu Chen and Kaiyan Zhang and Xingtai Lv and Shuo Wang and Yuan Yao and Hao Peng and Yu Cheng and Zhiyuan Liu and Maosong Sun and Bowen Zhou and Ning Ding},
-  year={2025}
+@misc{cui2025processreinforcementimplicitrewards,
+      title={Process Reinforcement through Implicit Rewards}, 
+      author={Ganqu Cui and Lifan Yuan and Zefan Wang and Hanbin Wang and Wendi Li and Bingxiang He and Yuchen Fan and Tianyu Yu and Qixin Xu and Weize Chen and Jiarui Yuan and Huayu Chen and Kaiyan Zhang and Xingtai Lv and Shuo Wang and Yuan Yao and Xu Han and Hao Peng and Yu Cheng and Zhiyuan Liu and Maosong Sun and Bowen Zhou and Ning Ding},
+      year={2025},
+      eprint={2502.01456},
+      archivePrefix={arXiv},
+      primaryClass={cs.LG},
+      url={https://arxiv.org/abs/2502.01456}, 
 }
 ```