update citation to display in bibtex format.

README.md

@@ -245,6 +245,7 @@ print("Value Output:", value_output)
 
 If you use this model in your research, please cite it as follows:
 
+```bibtex
 @misc{stockzero,
   author = {Nirajan Dhakal},
   title = {StockZero: A Self-Play Reinforcement Learning Chess Engine},
@@ -252,4 +253,5 @@ If you use this model in your research, please cite it as follows:
   publisher = {Hugging Face},
   journal = {Hugging Face Model Card},
   howpublished = {\url{https://huggingface.co/nirajandhakal/StockZero-v2}}
-}
+}
+```