`rouge` is not available

Hi, I am using `rouge` like
```py
import evaluate
evaluate.load("rouge")
```

And it reports errors like
```
FileNotFoundError: Couldn't find a module script at .../rouge/rouge.py. Module 'rouge' doesn't exist on the Hugging Face Hub either.
```

I noticed that there is a runtime error on the [huggingface space](https://huggingface.co/spaces/evaluate-metric/rouge), maybe something requires fixing? 🤗