[ENHANCEMENT] update black version

[hwdef]

Is your feature request related to a problem? Please describe.

I noticed that the current black version of megatron-lm is very old and already behind NeMo https://github.com/NVIDIA/NeMo/blob/b0f3138a6be7fab3175deb8935f8492aeb1445bd/pyproject.toml#L33

Describe the solution you'd like

update black version

[hwdef]

@jaredcasper Hi, Cloud you please take a look? If you don't have time, I can update it.

[github-actions[bot]]

Marking as stale. No activity in 60 days.

[sbhavani]

Closed by commit c599067