Fix SFTTrainer: use tokenizer instead of processing_class

train.py

@@ -328,7 +328,7 @@ def main():
         eval_dataset=dataset["test"],
         args=training_args,
         peft_config=lora_config,
-        processing_class=tokenizer,
+        tokenizer=tokenizer,
         max_seq_length=2048,  # 7Bなので少し長く
         packing=True,
         dataset_text_field="text",