[11.x] Use PHPUnit v11 (#6385)

Everythings works with no changes needed.

See:
* https://phpunit.de/announcements/phpunit-11.html
* https://github.com/sebastianbergmann/phpunit/blob/11.0.0/ChangeLog-11.0.md

composer.json

@@ -15,7 +15,7 @@
         "laravel/sail": "^1.26",
         "mockery/mockery": "^1.6",
         "nunomaduro/collision": "^8.0",
-        "phpunit/phpunit": "^10.5",
+        "phpunit/phpunit": "^11.0",
         "spatie/laravel-ignition": "^2.4"
     },
     "autoload": {