Update dependency phpunit/phpunit to ^12.2.9 (#71)

| datasource | package         | from   | to     |
| ---------- | --------------- | ------ | ------ |
| packagist  | phpunit/phpunit | 12.2.8 | 12.2.9 |

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

composer.json

@@ -19,7 +19,7 @@
         "nette/neon": "^3.4.4",
         "nikic/php-parser": "^4.19.2 || ^5.6.0",
         "phpstan/phpstan-phpunit": "^2.0.7",
-        "phpunit/phpunit": "^12.2.8",
+        "phpunit/phpunit": "^12.2.9",
         "slam/php-cs-fixer-extensions": "^3.12.0"
     },
     "autoload": {