Update dependency phpunit/phpunit to ^12.5.28 (4.2)

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
phpunit/phpunit (source)	^12.5.27 → ^12.5.28

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Release Notes

sebastianbergmann/phpunit (phpunit/phpunit)

v12.5.28: PHPUnit 12.5.28

Compare Source

Fixed

• #​6681: XML assertions such as assertXmlStringEqualsXmlString() regressed into treating comments as significant

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.22%. Comparing base (d8195df) to head (2c2a438).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff            @@
##                4.2      #27   +/-   ##
=========================================
  Coverage     99.22%   99.22%           
  Complexity       47       47           
=========================================
  Files             5        5           
  Lines           129      129           
=========================================
  Hits            128      128           
  Misses            1        1           

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