build: install comtypes only for windows

[SMoraisAnsys]

Description

Since comtypes.client.CreateObject is only used for windows, it would be great to only install it on that platform. Strange behavior have been detected on another workflow when using pyspeos on other system, e.g. Github's runner ubuntu-22.04.

Issue linked

None

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 assigned this PR to myself.
• I have made sure that the title of my PR follows Conventional commits style (e.g. feat: add optical property)
• I have agreed with the Contributor License Agreement (CLA).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.90%. Comparing base (89457c1) to head (2e27f25).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #704   +/-   ##
=======================================
  Coverage   88.90%   88.90%           
=======================================
  Files          39       39           
  Lines        5617     5617           
=======================================
  Hits         4994     4994           
  Misses        623      623           

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