[pre-commit.ci] pre-commit autoupdate

[pre-commit-ci]

updates:

• github.com/asottile/pyupgrade: v2.34.0 → v2.37.3
• github.com/PyCQA/flake8: 4.0.1 → 5.0.2
• github.com/pre-commit/mirrors-mypy: v0.961 → v0.971

[codecov]

Codecov Report

Merging #432 (5a44003) into master (876edf3) will decrease coverage by 0.07%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##           master     #432      +/-   ##
==========================================
- Coverage   81.43%   81.36%   -0.08%     
==========================================
  Files          29       29              
  Lines        2559     2560       +1     
==========================================
- Hits         2084     2083       -1     
- Misses        475      477       +2     

Flag	Coverage Δ
pytests	81.36% <50.00%> (-0.08%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
myst_nb/core/loggers.py	72.54% <0.00%> (-1.46%)	⬇️
myst_nb/ext/glue/crossref.py	38.80% <100.00%> (ø)
myst_nb/sphinx_.py	90.13% <100.00%> (ø)
myst_nb/core/render.py	84.94% <0.00%> (-0.23%)	⬇️

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