Update dependency sebastian/environment to v9

| datasource | package               | from  | to    |
| ---------- | --------------------- | ----- | ----- |
| packagist  | sebastian/environment | 8.0.3 | 9.0.0 |

Author: renovate[bot]

composer.json

@@ -44,7 +44,7 @@
         "phpunit/php-file-iterator": "^6",
         "phpunit/php-timer": "^8",
         "phpunit/phpunit": "^12.5.9",
-        "sebastian/environment": "^8.0.3",
+        "sebastian/environment": "^9.0.0",
         "symfony/console": "^7.3.4 || ^8.0.0",
         "symfony/process": "^7.3.4 || ^8.0.0"
     },