Update README.md - fix fine-tuning guide link

README.md

@@ -157,7 +157,7 @@ accelerate launch --num_processes=1 train.py \
     --results_dir ./results/toy_finetune_lora
 ```
 
-Please refer to [docs/finetune.md](https://github.com/VectorSpaceLab/OmniGen/blob/main/docs/finetune.md) for more details (e.g. full finetune).
+Please refer to [docs/finetune.md](https://github.com/VectorSpaceLab/OmniGen/blob/main/docs/fine-tune.md) for more details (e.g. full finetune).