fixed typo from enable to disable in disable_progress_bar function
# What does this PR do?

This PR fixes the typo from `Enable progress bar` to `Disable progress bar` in `disable_progress_bar()` function's documentation.

- [x] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
@sgugger can you please review this PR?<|||||>_The documentation is not available anymore as the PR was closed or merged._