misc: update contributing guidelines

[miketheman]

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[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.83%. Comparing base (22944af) to head (2f7883d).
Report is 300 commits behind head on main.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1047      +/-   ##
==========================================
+ Coverage   95.26%   95.83%   +0.57%     
==========================================
  Files          13       13              
  Lines         401      432      +31     
==========================================
+ Hits          382      414      +32     
+ Misses         19       18       -1     

Flag	Coverage Δ
unittests	95.83% <ø> (+0.57%)	⬆️

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