Update citation

README.md

@@ -41,12 +41,10 @@ In this work, we first empirically verify that representing this semantic space
 If you find this work useful, please consider citing:
 
 ```latex
-@misc{conti2023vocabularyfree,
+@article{conti2023vocabularyfree,
       title={Vocabulary-free Image Classification},
       author={Alessandro Conti and Enrico Fini and Massimiliano Mancini and Paolo Rota and Yiming Wang and Elisa Ricci},
       year={2023},
-      eprint={2306.00917},
-      archivePrefix={arXiv},
-      primaryClass={cs.CV}
+      journal={NeurIPS},
 }
 ```