chore: use 2x faster black mirror (#555)

Author: henryiii

.pre-commit-config.yaml

@@ -23,7 +23,7 @@ repos:
     - id: ruff
       args: [--fix, --show-fixes]
 
-- repo: https://github.com/psf/black
+- repo: https://github.com/psf/black-pre-commit-mirror
   rev: 23.7.0
   hooks:
   - id: black