ci: pre-commit autoupdate

[pre-commit-ci]

updates:

• github.com/adamchainz/blacken-docs: 1.19.1 → 1.20.0

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.30%. Comparing base (dabde96) to head (de2d710).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4215   +/-   ##
=======================================
  Coverage   91.30%   91.30%           
=======================================
  Files         193      193           
  Lines       15715    15715           
=======================================
  Hits        14348    14348           
  Misses       1367     1367           

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