Update dependency phpunit/phpunit to v12.3.6 (#4656)

This PR contains the following updates:

| Package | Change | Age | Confidence |
|---|---|---|---|
| [phpunit/phpunit](https://phpunit.de/)
([source](https://redirect.github.com/sebastianbergmann/phpunit)) |
`12.3.5` -> `12.3.6` |
[![age](https://developer.mend.io/api/mc/badges/age/packagist/phpunit%2fphpunit/12.3.6?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/packagist/phpunit%2fphpunit/12.3.5/12.3.6?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

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

###
[`v12.3.6`](https://redirect.github.com/sebastianbergmann/phpunit/compare/12.3.5...12.3.6)

[Compare
Source](https://redirect.github.com/sebastianbergmann/phpunit/compare/12.3.5...12.3.6)

</details>

---

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---

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composer.json

@@ -67,7 +67,7 @@
         "phpstan/phpstan-doctrine": "2.0.4",
         "phpstan/phpstan-phpunit": "2.0.6",
         "phpstan/phpstan-symfony": "2.0.6",
-        "phpunit/phpunit": "12.3.5",
+        "phpunit/phpunit": "12.3.6",
         "psalm/plugin-phpunit": "0.19.3",
         "psalm/plugin-symfony": "5.2.7",
         "rector/rector": "2.1.1",