CONTRIBUTING address review comments

[kingthorin]

Per: #1383 (review)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.40%. Comparing base (1e838cb) to head (4b22912).
Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1384      +/-   ##
============================================
- Coverage     92.48%   92.40%   -0.09%     
+ Complexity     3150     3149       -1     
============================================
  Files           319      319              
  Lines          6178     6178              
  Branches        604      604              
============================================
- Hits           5714     5709       -5     
- Misses          321      326       +5     
  Partials        143      143              

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