Use the latest BG cookiecutter release_checklist.md

[bobleesj]

Closes #72

[cadenmyers13]

Thanks, dont forget news! @bobleesj

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.78%. Comparing base (cb0a441) to head (6be2705).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #74   +/-   ##
=======================================
  Coverage   93.78%   93.78%           
=======================================
  Files           4        4           
  Lines         177      177           
=======================================
  Hits          166      166           
  Misses         11       11           

[bobleesj]

@cadenmyers13 we also learned sth new with pdffit2 as well - primality "run python -m build and twine check dist/*" - where we also check the package can be built locally and also make sure .rst files are properly formatted for PyPI release. Overall, it will be even a better checklist for 0.2.1.

@sbillinge ready for merge.