FIX: Compatibility with Python 3.8

[Samuelopez-ansys]

Description

Please provide a brief description of the changes made in this pull request.

Issue linked

Close #5971

Checklist

• I have tested my changes locally.
• I have added necessary documentation or updated existing documentation.
• I have followed the coding style guidelines of this project.
• I have added appropriate tests (unit, integration, system).
• I have reviewed my changes before submitting this pull request.
• I have linked the issue or issues that are solved by the PR if any.
• I have agreed with the Contributor License Agreement (CLA).

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[lorenzovecchietti]

LGTM. I wasn't aware of this compatibility issue, thanks.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.01%. Comparing base (28515e3) to head (e362e96).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5972      +/-   ##
==========================================
- Coverage   85.01%   85.01%   -0.01%     
==========================================
  Files         162      162              
  Lines       62568    62569       +1     
==========================================
- Hits        53194    53193       -1     
- Misses       9374     9376       +2     

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