Coverage is No Longer Calculated in GitHub Actions

[gkapfham]

Here is an excerpt of what happens when the coverage report task is run in GitHub Actions:

tests/test_display.py ......
tests/test_util.py ......
tests/test_advise.py ........
tests/test_convert.py .
tests/test_pytest_plugin.py .....
tests/test_enumerations.py .........
tests/test_extract.py ...............
tests/test_main.py .......
tests/test_exceptions.py ...
/home/runner/.cache/pypoetry/virtualenvs/execexam-BC1fJuE6-py3.12/lib/python3.12/site-packages/coverage/inorout.py:505: CoverageWarning: Module my_package was never imported. (module-not-imported)
  self.warn(f"Module {pkg} was never imported.", slug="module-not-imported")
/home/runner/.cache/pypoetry/virtualenvs/execexam-BC1fJuE6-py3.12/lib/python3.12/site-packages/coverage/control.py:892: CoverageWarning: No data was collected. (no-data-collected)
  self._warn("No data was collected.", slug="no-data-collected")
/home/runner/.cache/pypoetry/virtualenvs/execexam-BC1fJuE6-py3.12/lib/python3.12/site-packages/pytest_cov/plugin.py:[31](https://github.com/GatorEducator/execexam/actions/runs/11959919713/job/33342783792#step:9:32)2: CovReportWarning: Failed to generate report: No data to report.

  warnings.warn(CovReportWarning(message))
tests/test_debug.py .......WARNING: Failed to generate report: No data to report.

This reveals that coverage report generation is no longer working correctly.