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	v2 -> v4

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Release Notes

actions/setup-python

v4

Compare Source

v3

Compare Source

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Configuration

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🔕 Ignore: Close this PR and you won't be reminded about this update again.

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[codecov]

Codecov Report

Merging #323 (059b4d6) into main (21d5ee8) will decrease coverage by 0.06%.
The diff coverage is 92.68%.

@@            Coverage Diff             @@
##             main     #323      +/-   ##
==========================================
- Coverage   90.25%   90.19%   -0.07%     
==========================================
  Files          78       79       +1     
  Lines        5882     6016     +134     
==========================================
+ Hits         5309     5426     +117     
- Misses        573      590      +17     

Impacted Files	Coverage Δ
mlem/api/commands.py	88.88% <ø> (ø)
mlem/cli/info.py	97.36% <ø> (ø)
mlem/ext.py	89.10% <ø> (ø)
mlem/cli/main.py	77.31% <50.00%> (-4.42%)	⬇️
mlem/core/index.py	65.71% <75.00%> (-1.62%)	⬇️
mlem/contrib/tensorflow.py	97.16% <97.16%> (ø)
mlem/contrib/fastapi.py	95.38% <100.00%> (+0.07%)	⬆️
mlem/core/artifacts.py	99.40% <100.00%> (+<0.01%)	⬆️
mlem/core/model.py	94.11% <100.00%> (+0.67%)	⬆️

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