docs: update citation

README.md

@@ -86,7 +86,7 @@ The `queries` split contains queries, with the text of a query being stored in t
 This dataset is licensed under [CC BY SA 4.0](https://choosealicense.com/licenses/cc-by-sa-4.0/).
 
 ## 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) as well.
 ```bibtex
 @inproceedings{Zheng_2025, series={CSLAW ’25},
    title={A Reasoning-Focused Legal Retrieval Benchmark},
@@ -101,11 +101,13 @@ If you use this dataset, please cite [MLEB](https://isaacus.com/mleb) as well.
    eprint={2505.03970}
 }
 
-@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}, 
 }
 ```