chore(deps-dev): update phpunit/phpunit requirement from ^9.5 to ^10.4

Updates the requirements on [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) to permit the latest version.
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/10.4.2/ChangeLog-10.4.md)
- [Commits](sebastianbergmann/phpunit@9.5.0...10.4.2)

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

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

composer.json

@@ -31,7 +31,7 @@
         "ekino/phpstan-banned-code":      "^1.0",
         "friendsofphp/php-cs-fixer":      "^3.0",
         "phpstan/phpstan-phpunit":        "^1.0",
-        "phpunit/phpunit":                "^9.5",
+        "phpunit/phpunit":                "^10.4",
         "sonata-project/admin-bundle":    "^4.0",
         "sonata-project/twig-extensions": "^2.0"
     },