Update dependency phpunit/phpunit to v10.2.6

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
phpunit/phpunit (source)	require-dev	patch	10.2.3 -> 10.2.6

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Release Notes

sebastianbergmann/phpunit (phpunit/phpunit)

### [`v10.2.6`](https://togithub.com/sebastianbergmann/phpunit/compare/10.2.5...10.2.6) [Compare Source](https://togithub.com/sebastianbergmann/phpunit/compare/10.2.5...10.2.6) ### [`v10.2.5`](https://togithub.com/sebastianbergmann/phpunit/compare/10.2.4...10.2.5) [Compare Source](https://togithub.com/sebastianbergmann/phpunit/compare/10.2.4...10.2.5) ### [`v10.2.4`](https://togithub.com/sebastianbergmann/phpunit/compare/10.2.3...10.2.4) [Compare Source](https://togithub.com/sebastianbergmann/phpunit/compare/10.2.3...10.2.4)

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