Update CODE_OF_CONDUCT.md

[zhiqwang]

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[codecov]

Codecov Report

Merging #61 (f6e6be4) into master (cdfb9d3) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #61   +/-   ##
=======================================
  Coverage   78.17%   78.17%           
=======================================
  Files           8        8           
  Lines         614      614           
=======================================
  Hits          480      480           
  Misses        134      134           

Flag	Coverage Δ
unittests	78.17% <ø> (ø)

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