Update README.md

README.md

@@ -58,7 +58,7 @@ Once the model is running, evaluate using the [official τ²-bench code](https:/
 @article{Chen2026CoVe,
   title   = {CoVe: Training Interactive Tool-Use Agents via Constraint-Guided Verification},
   author  = {Chen, Jinpeng and Gong, Cheng and Li, Hanbo and Liu, Ziru and Tian, Zichen and Fu, Xinyu and Wu, Shi and Zhang, Chenyang and Zhang, Wu and Zhang, Suiyun and Tu, Dandan and Liu, Rui},
-  journal = {arXiv preprint arXiv:PLACEHOLDER_ARXIV_ID},
+  journal = {arXiv preprint arXiv:2603.01940},
   year    = {2026}
 }
 ```