Can't get tatoeba.rus dataset
## Describe the bug
It gives an error.

> FileNotFoundError: Couldn't find file at https://github.com/facebookresearch/LASER/raw/master/data/tatoeba/v1/tatoeba.rus-eng.rus

## Steps to reproduce the bug
```python
data=load_dataset("xtreme","tatoeba.rus", split="validation")
```

## Solution
The library tries to access the **master** branch. In the github repo of facebookresearch, it is in the **main** branch.