Bump mypy to v2.3.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
mypy (changelog)	==2.3.0 → ==2.3.1

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Release Notes

python/mypy (mypy)

v2.3.1

Compare Source

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.79%. Comparing base (64aa108) to head (24b3829).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #299   +/-   ##
=======================================
  Coverage   98.79%   98.79%           
=======================================
  Files           5        5           
  Lines         414      414           
=======================================
  Hits          409      409           
  Misses          5        5           

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