tiny fix about badam

src/llamafactory/train/sft/trainer.py

@@ -56,7 +56,8 @@ class CustomSeq2SeqTrainer(Seq2SeqTrainer):
             self.save_model(os.path.join(self.args.output_dir, "pissa_init"))
 
         if finetuning_args.use_badam:
-            from badam import clip_grad_norm_old_version, BAdamCallback
+            from badam import BAdamCallback, clip_grad_norm_old_version
+
             self.accelerator.clip_grad_norm_ = MethodType(clip_grad_norm_old_version, self.accelerator)
             self.callback_handler.add_callback(BAdamCallback)