chore(deps): update actions/setup-python action to v4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/setup-python	action	major	v3 -> v4

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Release Notes

actions/setup-python

v4

Compare Source

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Configuration

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[codecov]

Codecov Report

Merging #26 (8a7814d) into main (1c7d858) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #26   +/-   ##
=======================================
  Coverage   94.39%   94.39%           
=======================================
  Files           4        4           
  Lines         214      214           
=======================================
  Hits          202      202           
  Misses         12       12           

Flag	Coverage Δ
unittests	94.39% <ø> (ø)

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