Update matthiasnoback/symfony-dependency-injection-test requirement |…

…| ^6.0

Updates the requirements on [matthiasnoback/symfony-dependency-injection-test](https://github.com/matthiasnoback/SymfonyDependencyInjectionTest) to permit the latest version.
- [Release notes](https://github.com/matthiasnoback/SymfonyDependencyInjectionTest/releases)
- [Changelog](https://github.com/SymfonyTest/SymfonyDependencyInjectionTest/blob/master/CHANGELOG.md)
- [Commits](SymfonyTest/SymfonyDependencyInjectionTest@5.1.0...6.0.0)

---
updated-dependencies:
- dependency-name: matthiasnoback/symfony-dependency-injection-test
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -94,7 +94,7 @@
         "doctrine/persistence": "^3.1",
         "ekino/phpstan-banned-code": "^1.0",
         "infection/infection": "^0.29",
-        "matthiasnoback/symfony-dependency-injection-test": "^5.1",
+        "matthiasnoback/symfony-dependency-injection-test": "^5.1 || ^6.0",
         "php-parallel-lint/php-parallel-lint": "^1.3",
         "phpstan/extension-installer": "^1.3",
         "phpstan/phpstan": "^1.8",