Update dependency checkstyle to v14

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
checkstyle (source)	13.11.0 → 14.0.0

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Release Notes

checkstyle/checkstyle (checkstyle)

v14.0.0

Compare Source

Checkstyle 14.0.0 - https://checkstyle.org/releasenotes.html#Release_14.0.0

New:

#​8240 - Java Grammar: module-info.java support.

Bug fixes:

#​21112 - InvalidJavadocPosition: false positive on module-info.java Javadoc.
#​21110 - PackageDeclaration: false positive "Missing package declaration" on module-info.java.

Other Changes:

Resolve Commons Logging incompatibility with XWiki validation.
doc: mention 14.x in JRE matrix and Java 25 language support on index page.
Renumber examples so default-config example is Example1.
Fix modules with incorrect example count in EXAMPLE_COUNT_SUPPRESSED_MODULES.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.27%. Comparing base (9ed0005) to head (6fb23e0).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #8733   +/-   ##
=========================================
  Coverage     91.26%   91.27%           
- Complexity    10461    10462    +1     
=========================================
  Files          1006     1006           
  Lines         28244    28244           
  Branches       3564     3564           
=========================================
+ Hits          25778    25779    +1     
  Misses         1674     1674           
+ Partials        792      791    -1     

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