Update finetune_flan_t5.py

finetune_flan_t5.py

@@ -1,6 +1,7 @@
 from datasets import load_dataset
 from transformers import AutoTokenizer, AutoModelForSeq2SeqLM, TrainingArguments
-from trl import SFTTrainer, DataCollatorForSeq2Seq
+from trl import SFTTrainer  # ✅ from trl
+from transformers import DataCollatorForSeq2Seq  # ✅ from transformers
 import torch
 
 # Load your dataset (from the converted JSONL file)