Fix languages of X-CSQA configs in xcsr dataset
_The documentation is not available anymore as the PR was closed or merged._ Thanks @lhoestq, I had missed that...  thx for the super fast work @albertvillanova ! any estimate for when the relevant release will happen?

Thanks again  @thesofakillers after a recent change in our library (see #4059), now fixes in all datasets are immediately accessible. You can try it:
```python
french = datasets.load_dataset("xcsr", "X-CSQA-fr")
```

Please note there is an additional fix to that dataset in progress (to be merged today):
- #5024
Fix #5017.

CC: @yangxqiao, @yuchenlin