Update dependency phpunit/phpunit to ^11.5.55

| datasource | package         | from    | to      |
| ---------- | --------------- | ------- | ------- |
| packagist  | phpunit/phpunit | 11.5.50 | 11.5.55 |

Author: renovate[bot]

composer.json

@@ -53,7 +53,7 @@
         "phpstan/phpstan-strict-rules": "^2.0.10",
         "phpstan/phpstan-symfony": "^2.0.15",
         "phpstan/phpstan-webmozart-assert": "^2.0.0",
-        "phpunit/phpunit": "^11.5.50",
+        "phpunit/phpunit": "^11.5.55",
         "roave/security-advisories": "dev-master",
         "symfony/config": "^6.4 || ^7.4 || ^8.0",
         "symfony/options-resolver": "^6.4 || ^7.4 || ^8.0",