update qwen infer.

examples/gpt/training_qwen_demo.py

@@ -67,7 +67,7 @@ def main():
             peft_name=args.output_dir,
             args={'use_peft': True, 'eval_batch_size': args.batch_size, "max_length": args.max_length, }
         )
-        result = m.correct_batch(error_sentences)
+        result = m.correct_batch(error_sentences, prefix_prompt="对这个句子语法纠错\n\n")
         for res_dict in result:
             print(res_dict)