Fix windows test PyPI install

[znicholls]

Description

Checklist

Please confirm that this pull request has done the following:

• Tests added
• (N/A) Documentation added (where applicable)
• Changelog item added to changelog/

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.13%. Comparing base (49db79f) to head (4939bdc).
Report is 16 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main       #9   +/-   ##
=======================================
  Coverage   81.13%   81.13%           
=======================================
  Files           5        5           
  Lines         281      281           
  Branches       46       46           
=======================================
  Hits          228      228           
  Misses         37       37           
  Partials       16       16           

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[znicholls]

gtg https://github.com/openscm/openscm-zenodo/actions/runs/10487476734/job/29047908553?pr=9