Update dependency phpunit/phpunit to ^12.3.12

| datasource | package         | from    | to      |
| ---------- | --------------- | ------- | ------- |
| packagist  | phpunit/phpunit | 12.3.11 | 12.3.12 |

Author: renovate[bot]

composer.json

@@ -17,7 +17,7 @@
         "phpstan/phpstan": "^2.1.28",
         "phpstan/phpstan-phpunit": "^2.0.7",
         "phpstan/phpstan-strict-rules": "^2.0.6",
-        "phpunit/phpunit": "^12.3.11",
+        "phpunit/phpunit": "^12.3.12",
         "slam/php-cs-fixer-extensions": "^3.12",
         "symfony/console": "^7.3.3"
     },