refactor: cleanup CycleSort

[alxkm]

CycleSort cleanup
Code readability improvements

• 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

Attention: Patch coverage is 88.23529% with 2 lines in your changes missing coverage. Please review.

Please upload report for BASE (master@c4e0adb). Learn more about missing BASE report.

Files	Patch %	Lines
...c/main/java/com/thealgorithms/sorts/CycleSort.java	88.23%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #5321   +/-   ##
=========================================
  Coverage          ?   42.39%           
  Complexity        ?     2632           
=========================================
  Files             ?      522           
  Lines             ?    15524           
  Branches          ?     2958           
=========================================
  Hits              ?     6582           
  Misses            ?     8648           
  Partials          ?      294           

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