Pin pytest to fix CI

[mraspaud]

This PR limits pytest to <8.0 to fix the CI

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (57122d3) 95.40% compared to head (0c10810) 95.40%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2730   +/-   ##
=======================================
  Coverage   95.40%   95.40%           
=======================================
  Files         371      371           
  Lines       52825    52825           
=======================================
  Hits        50399    50399           
  Misses       2426     2426           

Flag	Coverage Δ
behaviourtests	4.15% <ø> (ø)
unittests	96.02% <ø> (ø)

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[coveralls]

Pull Request Test Coverage Report for Build 7697525358

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 95.968%

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Totals
Change from base Build 7670481337:	0.0%
Covered Lines:	50525
Relevant Lines:	52648

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💛 - Coveralls