add yyccbb as a contributor for code

[allcontributors]

Adds @yyccbb as a contributor for code.

This was requested by lhw-1 in this comment

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 52.16%. Comparing base (838f520) to head (ef43c2d).
Report is 6 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff            @@
##           master    #2676    +/-   ##
========================================
  Coverage   52.16%   52.16%            
========================================
  Files         128      128            
  Lines        6999     6999            
  Branches     1528     1462    -66     
========================================
  Hits         3651     3651            
+ Misses       3194     3049   -145     
- Partials      154      299   +145     

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[github-actions]

@lhw-1 Each PR must have a SEMVER impact label, please remember to label the PR properly.