build(deps-dev): bump phpunit/phpunit from 11.5.6 to 12.0.4

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 11.5.6 to 12.0.4.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/12.0.4/ChangeLog-12.0.md)
- [Commits](sebastianbergmann/phpunit@11.5.6...12.0.4)

---
updated-dependencies:
- dependency-name: phpunit/phpunit
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

composer.json

@@ -23,7 +23,7 @@
         "ergebnis/composer-normalize": "^2.41",
         "friendsofphp/php-cs-fixer": "^3.65",
         "phpstan/phpstan": "^2.0",
-        "phpunit/phpunit": "^11.0",
+        "phpunit/phpunit": "^12.0",
         "symfony/browser-kit": "~7.2.0",
         "symfony/css-selector": "~7.2.0",
         "symfony/maker-bundle": "^1.52",