composer(deps-dev): bump phpunit/phpunit from 10.2.5 to 10.2.6

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 10.2.5 to 10.2.6.
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/10.2.6/ChangeLog-10.2.md)
- [Commits](sebastianbergmann/phpunit@10.2.5...10.2.6)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]