docs: update citation

README.md

@@ -88,22 +88,15 @@ This dataset was constructed by collecting all publicly available UK laws, conve
 This dataset is licensed under [CC BY 4.0](https://choosealicense.com/licenses/cc-by-4.0/) which permits both non-commercial and commercial use of this dataset provided appropriate attribution is made to it.
 
 ## Citation 🔖
-If you use this dataset, please cite [MLEB](https://isaacus.com/mleb) as well.
+If you use this dataset, please cite the [Massive Legal Embeddings Benchmark (MLEB)](https://arxiv.org/abs/2510.19365):
 ```bibtex
-@misc{butler-2025-uk-legislative-long-titles,
-    author = {Butler, Umar},
-    year = {2025},
-    title = {UK Legislative Long Titles},
-    publisher = {Isaacus},
-    version = {0.1.0},
-    url = {https://huggingface.co/datasets/isaacus/uk-legislative-long-titles}
-}
-
-@misc{mleb-2025,
-  title={Massive Legal Embedding Benchmark (MLEB)},
-  author={Umar Butler and Abdur-Rahman Butler},
-  year={2025},
-  url={https://isaacus.com/blog/introducing-mleb},
-  publisher={Isaacus}
+@misc{butler2025massivelegalembeddingbenchmark,
+      title={The Massive Legal Embedding Benchmark (MLEB)}, 
+      author={Umar Butler and Abdur-Rahman Butler and Adrian Lucas Malec},
+      year={2025},
+      eprint={2510.19365},
+      archivePrefix={arXiv},
+      primaryClass={cs.CL},
+      url={https://arxiv.org/abs/2510.19365}, 
 }
 ```