CI: bumping python version for OSX job

[bsipocz]

Installing the dependencies takes forever, hopefully this change will make the job much faster than the current 13mins.

Currently a draft as it doesn't fixes the slowness of the job.

[bsipocz]

Well, this doesn't do the trick, the job is still very slow :(

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.70%. Comparing base (6ae40c1) to head (f891d66).
⚠️ Report is 19 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3552      +/-   ##
==========================================
+ Coverage   72.65%   72.70%   +0.05%     
==========================================
  Files         219      219              
  Lines       20484    20493       +9     
==========================================
+ Hits        14883    14900      +17     
+ Misses       5601     5593       -8     

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