chore: Use 2x faster black mirror

[henryiii]

Description

Update black pre-commit hook repo to faster https://github.com/psf/black-pre-commit-mirror.

Committed via https://github.com/asottile/all-repos

Checklist Before Requesting Reviewer

• Tests are passing
• "WIP" removed from the title of the pull request
• Selected an Assignee for the PR to be responsible for the log summary

Before Merging

For the PR Assignees:

• Summarize commit messages into a comprehensive review of the PR

* Update black pre-commit hook repo to faster
  https://github.com/psf/black-pre-commit-mirror.

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (0da1313) 98.30% compared to head (9ed4a90) 98.30%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2270   +/-   ##
=======================================
  Coverage   98.30%   98.30%           
=======================================
  Files          69       69           
  Lines        4534     4534           
  Branches      802      802           
=======================================
  Hits         4457     4457           
  Misses         45       45           
  Partials       32       32           

Flag	Coverage Δ
contrib	97.88% <ø> (ø)
doctest	61.09% <ø> (ø)
unittests-3.10	96.31% <ø> (ø)
unittests-3.11	96.31% <ø> (ø)
unittests-3.8	96.33% <ø> (ø)
unittests-3.9	96.36% <ø> (ø)

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[matthewfeickert]

Many thank @henryiii! I'll fixup the issues with the docs and get this merged.