update README.md citation

README.md

@@ -71,16 +71,13 @@ However, as this was a manual process, there might be duplicates or similar prob
 If you found our work useful, please consider citing it:
 
 ```bib
-@dataset{michailidis_2025_15592407,
-  author       = {Michailidis, Kostis and
-                  Tsouros, Dimosthenis and
-                  Guns, Tias},
-  title        = {CP-Bench},
-  month        = jun,
-  year         = 2025,
-  publisher    = {Zenodo},
-  version      = {1.0.0},
-  doi          = {10.5281/zenodo.15592407},
-  url          = {https://doi.org/10.5281/zenodo.15592407},
+@misc{michailidis2025cpbench,
+  title={CP-Bench: Evaluating Large Language Models for Constraint Modelling}, 
+  author={Kostis Michailidis and Dimos Tsouros and Tias Guns},
+  year={2025},
+  eprint={2506.06052},
+  archivePrefix={arXiv},
+  primaryClass={cs.AI},
+  url={https://arxiv.org/abs/2506.06052}, 
 }
 ```