Update README.md

README.md

@@ -107,7 +107,7 @@ generate_cfg = {
 }
 ```
 
-- For a query that you need to find a short and accurate answer. Add the following phrase: "\n\nPlease reason step-by-step and put the final answer within \\boxed{}."
+- For a query that you need to find a short and accurate answer. Add the following phrase: "\n\nPlease reason step-by-step and put the final answer within \\\\boxed{}."
 
 ## Citation