Improve comments in Mcoloring.java

[Hardvan]

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized it.
• All filenames are in PascalCase.
• All functions and variable names follow Java naming conventions.
• All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations.
• All new code is formatted with clang-format -i --style=file path/to/your/file.java

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 52.30%. Comparing base (0bd86b3) to head (2190d6d).

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #5484   +/-   ##
=========================================
  Coverage     52.29%   52.30%           
+ Complexity     3257     3256    -1     
=========================================
  Files           525      525           
  Lines         15185    15185           
  Branches       2887     2887           
=========================================
+ Hits           7941     7942    +1     
+ Misses         6920     6919    -1     
  Partials        324      324           

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[siriak]

Looks good, thanks!

[Hardvan]

Thank you!