Update phpunit/phpunit requirement from ^9.5 to ^11.4

Updates the requirements on [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) to permit the latest version.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/11.4.4/ChangeLog-11.4.md)
- [Commits](sebastianbergmann/phpunit@9.5.0...11.4.4)

---
updated-dependencies:
- dependency-name: phpunit/phpunit
  dependency-type: direct:development
...

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

composer.json

@@ -51,7 +51,7 @@
         "ext-pdo_sqlite": "*",
         "friendsofphp/php-cs-fixer": "^3.0",
         "phpstan/phpstan": "^1.3",
-        "phpunit/phpunit": "^9.5",
+        "phpunit/phpunit": "^11.4",
         "rector/rector": "^1.2",
         "symfony/maker-bundle": "^1.61",
         "symfony/phpunit-bridge": "^7.0",