LLM4AAMAS: minor modification

README.md

@@ -410,7 +410,7 @@ experimental economics or social psychology.
 LLMs, notably GPT-4 using ToT prompt, can simulate simple auction experiments in
 line with theoretical expectations.
 
-- *[The nuances of large-language-model-agent performance in simple English
+- **[The nuances of large-language-model-agent performance in simple English
   auctions](https://www.academia.edu/download/112356998/13_231004_2023_Jan_Reg_Nuances_of_LLM_Performance_English_Auctions_Parady_USA_Published.pdf)**
   Lamichhane, B., Palardy, J., & Singh, A. K. (2023). Empirical Economics
   Letters,2(1).