fix(deps): update dependency checkstyle to v10.21.2

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
checkstyle (source)	10.21.1 -> 10.21.2

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Release Notes

checkstyle/checkstyle (checkstyle)

v10.21.2

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Configuration

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.96%. Comparing base (070aedc) to head (a40839f).
Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #7043   +/-   ##
=========================================
  Coverage     89.96%   89.96%           
  Complexity     6663     6663           
=========================================
  Files           748      748           
  Lines         20085    20085           
  Branches       1970     1970           
=========================================
  Hits          18069    18069           
  Misses         1423     1423           
  Partials        593      593           

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