Add arxiv paper link (arXiv:2605.21171)

README.md

@@ -250,10 +250,10 @@ print(f"Evaluated {total} samples")
 ## 📝 Citation
 
 ```bibtex
-@inproceedings{rucinski2026ftervit,
+@article{rucinski2026ftervit,
   title={FTerViT: Fully Ternary Vision Transformer},
   author={Ruci{\'n}ski, Szymon and Bonazzi, Pietro and Turetken, Engin and Narduzzi, Simon and Magno, Michele and Maamari, Nadim},
-  booktitle={NeurIPS},
+  journal={arXiv preprint arXiv:2605.21171},
   year={2026}
 }
 ```