Update dependency phpunit/phpunit to v11.5.5 (#4379)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [phpunit/phpunit](https://phpunit.de/)
([source](https://redirect.github.com/sebastianbergmann/phpunit)) |
`11.5.4` -> `11.5.5` |
[![age](https://developer.mend.io/api/mc/badges/age/packagist/phpunit%2fphpunit/11.5.5?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/packagist/phpunit%2fphpunit/11.5.5?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/packagist/phpunit%2fphpunit/11.5.4/11.5.5?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/packagist/phpunit%2fphpunit/11.5.4/11.5.5?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>sebastianbergmann/phpunit (phpunit/phpunit)</summary>

###
[`v11.5.5`](https://redirect.github.com/sebastianbergmann/phpunit/compare/11.5.4...11.5.5)

[Compare
Source](https://redirect.github.com/sebastianbergmann/phpunit/compare/11.5.4...11.5.5)

</details>

---

### Configuration

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

🚦 **Automerge**: Enabled.

♻ **Rebasing**: Whenever PR is behind base branch, or you tick the
rebase/retry checkbox.

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

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/Runroom/archetype-symfony).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4xMjUuMSIsInVwZGF0ZWRJblZlciI6IjM5LjEyNS4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6W119-->

composer.json

@@ -67,7 +67,7 @@
         "phpstan/phpstan-doctrine": "2.0.1",
         "phpstan/phpstan-phpunit": "2.0.4",
         "phpstan/phpstan-symfony": "2.0.2",
-        "phpunit/phpunit": "11.5.4",
+        "phpunit/phpunit": "11.5.5",
         "psalm/plugin-phpunit": "0.19.2",
         "psalm/plugin-symfony": "5.2.7",
         "rector/rector": "2.0.7",