Update README.md

README.md

@@ -129,6 +129,8 @@ question = "生抽与老抽的区别？"
 answer, history = model.chat(tokenizer=tokenizer, question=question, history=[], generation_config=generate_config,
                                   stream=False)
 print(answer)
+```
+
 ```
 生抽和老抽是两种不同的酱油，它们在风味、色泽和用途上都有所区别。