model_name_or_path defaults

In [`llama/train.py`](https://github.com/epfml/landmark-attention/blob/main/llama/train.py) you have the following `ModelArguments`:
```
@dataclass
class ModelArguments:
    model_name_or_path: Optional[str] = field(default="facebook/opt-125m")
```

The whole folder is dedicated to finetuning LLaMA, so is defaulting to OPT wise?