Bump phpunit/phpunit from 9.6.22 to 11.5.6

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 9.6.22 to 11.5.6.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/11.5.6/ChangeLog-11.5.md)
- [Commits](sebastianbergmann/phpunit@9.6.22...11.5.6)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

composer.json

@@ -101,7 +101,7 @@
         }
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.5",
+        "phpunit/phpunit": "^11.5",
         "symfony/browser-kit": "7.2.*",
         "symfony/css-selector": "7.2.*",
         "symfony/debug-bundle": "7.2.*",