bart config changes
# What does this PR do?
PR for issue below:
![image](https://user-images.githubusercontent.com/49692939/195200740-7f361283-4246-4550-9fc9-33d6d7e5b6e8.png)

Test passed:
![image](https://user-images.githubusercontent.com/49692939/195200622-146ee670-dbc4-4a84-a555-3565b29cb749.png)

_The documentation is not available anymore as the PR was closed or merged._<|||||>Not sure why it fails the check_code_quality test. Doing exactly what is written here: https://github.com/huggingface/transformers/pull/19485
<|||||>> Not sure why it fails the check_code_quality test. Doing exactly what is written here: #19485

Hi @imarekkus Could you try to run `make style` and see what happens?
Also, please do not change the `configuration_bert.py` in this PR, it is done in #19485, thank you 🙏 