Update dependency phpunit/phpunit to ^11.5.9

| datasource | package         | from   | to     |
| ---------- | --------------- | ------ | ------ |
| packagist  | phpunit/phpunit | 11.5.8 | 11.5.9 |

Author: renovate[bot]

composer.json

@@ -32,7 +32,7 @@
         "laminas/laminas-validator": "^2.64.2",
         "phpstan/phpstan-deprecation-rules": "^2.0.1",
         "phpstan/phpstan-phpunit": "^2.0.4",
-        "phpunit/phpunit": "^11.5.8",
+        "phpunit/phpunit": "^11.5.9",
         "slam/php-cs-fixer-extensions": "^3.12.0"
     },
     "conflict": {