Fixing CI/CD flow

[denvir-py]

The CI/CD workflow began failing for MacOS due the way cmake was being installed. Calling brew install cmake forced Homebrew to resolve from homebrew/core, which clashed with the pinned one and aborted the job.

Another bug was found after solving the homebrew error that was not present until 2 weeks ago. This bug required permissions to git clone the repository. Line 46 solves this: persist-credentials: false

This PR will resolve the failing CI/CD.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 64.34%. Comparing base (9835bc4) to head (bc6217a).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #108      +/-   ##
==========================================
+ Coverage   64.13%   64.34%   +0.21%     
==========================================
  Files          19       19              
  Lines        7028     7028              
==========================================
+ Hits         4507     4522      +15     
+ Misses       2521     2506      -15     

Flag	Coverage Δ
unittests	64.34% <ø> (+0.21%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.
see 1 file with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[SuperdoerTrav]

Thanks for the detailed explanation and thorough fix, @denvir-py. The changes address the CI/CD failures cleanly, and the adjustments for Homebrew and credential handling look solid. All checks are passing, and Codecov confirms test coverage is maintained.