[Chapel Merge] Pin the pytest version to one that I think worked

Branch: refs/heads/main
Revision: 2749367
Author: lydia-duncan
Link: Unavailable
Log Message:

Merge pull request #65 from lydia-duncan/pinPytest

Pin the pytest version to one that I think worked before
[simple, not reviewed]

This may resolve the issues I had with building the new release, but I'm not
sure yet

Modified Files:
M test-requirements.txt

Compare: https://github.com/chapel-lang/sphinxcontrib-chapeldomain/compare/8ce1fd28828e...274936729d64