Add citation

README.md

@@ -21,4 +21,17 @@ To use this dataset, you can run the following code :
 ```py
 from datasets import load_dataset
 dataset = load_dataset("lyon-nlp/clustering-hal-s2s", "test")
+```
+
+### Citation
+If you use this dataset in your work, please consider citing:
+```
+@misc{ciancone2024extending,
+      title={Extending the Massive Text Embedding Benchmark to French}, 
+      author={Mathieu Ciancone and Imene Kerboua and Marion Schaeffer and Wissam Siblini},
+      year={2024},
+      eprint={2405.20468},
+      archivePrefix={arXiv},
+      primaryClass={cs.CL}
+}
 ```