Fix PHPUnit notice use stub over mock on DocumentationMenuFactoryTest

[samsonasik]

Before

vendor/bin/phpunit --display-phpunit-notices
PHPUnit 13.0.5 by Sebastian Bergmann and contributors.

Runtime:       PHP 8.4.21
Configuration: /Users/samsonasik/www/getrector-com/phpunit.xml

..........................NN............................          56 / 56 (100%)

Time: 00:09.883, Memory: 93.00 MB

2 tests triggered 2 PHPUnit notices:

1) App\Tests\Documentation\DocumentationMenuFactoryTest::testSectionTitle
No expectations were configured for the mock object for Illuminate\Contracts\Routing\UrlGenerator. Consider refactoring your test code to use a test stub instead. The #[AllowMockObjectsWithoutExpectations] attribute can be used to opt out of this check.

/Users/samsonasik/www/getrector-com/tests/Documentation/DocumentationMenuFactoryTest.php:29

2) App\Tests\Documentation\DocumentationMenuFactoryTest::testCategory
No expectations were configured for the mock object for Illuminate\Contracts\Routing\UrlGenerator. Consider refactoring your test code to use a test stub instead. The #[AllowMockObjectsWithoutExpectations] attribute can be used to opt out of this check.

/Users/samsonasik/www/getrector-com/tests/Documentation/DocumentationMenuFactoryTest.php:35

OK, but there were issues!
Tests: 56, Assertions: 120, PHPUnit Notices: 2.

After

vendor/bin/phpunit --display-phpunit-notices
PHPUnit 13.0.5 by Sebastian Bergmann and contributors.

Runtime:       PHP 8.4.21
Configuration: /Users/samsonasik/www/getrector-com/phpunit.xml

........................................................          56 / 56 (100%)

Time: 00:09.859, Memory: 93.00 MB

OK (56 tests, 120 assertions)

[samsonasik]

All green 🎉 @TomasVotruba let's merge ;)