Bump phpunit/phpunit from 11.4.0 to 11.4.1 in /examples/php-phpunit

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 11.4.0 to 11.4.1.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/11.4.1/ChangeLog-11.4.md)
- [Commits](sebastianbergmann/phpunit@11.4.0...11.4.1)

---
updated-dependencies:
- dependency-name: phpunit/phpunit
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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