Update php-actions/phpunit action to v9 - autoclosed

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
php-actions/phpunit	action	major	v3 -> v9

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Release Notes

php-actions/phpunit (php-actions/phpunit)

### [`v9`](https://togithub.com/php-actions/phpunit/releases/tag/v9): PHPUnit v9 (latest stable) [Compare Source](https://togithub.com/php-actions/phpunit/compare/v8...v9) This is the latest stable release of PHPUnit, other versions of the action are based from this one. ### [`v8`](https://togithub.com/php-actions/phpunit/releases/tag/v8): PHPUnit v8 [Compare Source](https://togithub.com/php-actions/phpunit/compare/v7...v8) This is a backport of functionality that runs PHPUnit at version 8. ### [`v7`](https://togithub.com/php-actions/phpunit/releases/tag/v7): PHPUnit v7 [Compare Source](https://togithub.com/php-actions/phpunit/compare/v3...v7) This is a backport of functionality that runs PHPUnit at version 7.

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• [ ] If you want to rebase/retry this PR, check this box

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