Model card: plain UTF-8 surname in the citation

README.md

@@ -122,7 +122,7 @@ been made by [Ahmet Sayman](https://huggingface.co/asaymantr). Source code:
 ```bibtex
 @software{pusula2026,
   title   = {Pusula: The First Full-Featured Turkish Decision Model},
-  author  = {{\c{S}}ahin, Hasan and Sayman, Ahmet},
+  author  = {Şahin, Hasan and Sayman, Ahmet},
   year    = {2026},
   version = {1.0},
   url     = {https://github.com/hsnsahinhsn/pusula},