Update README.md

README.md

@@ -2549,6 +2549,7 @@ If you use this dataset in your research, please cite the TokSuite paper:
   author={Altıntaş, Gül Sena and Ehghaghi, Malikeh and Lester, Brian and Liu, Fengyuan and Zhao, Wanru and Ciccone, Marco and Raffel, Colin},
   booktitle={Preprint.},
   year={2026},
+  arxiv={https://arxiv.org/abs/2512.20757},
   url={TBD}
 }
 ```