Configure your rector.php:

<?php

use Rector\Config\RectorConfig;
use Rector\Renaming\Rector\PropertyFetch\RenamePropertyRector;
use Rector\Renaming\ValueObject\RenameProperty;

return RectorConfig::configure()
    ->withConfiguredRule(RenamePropertyRector::class, [
        new RenameProperty('SomeClass', 'someOldProperty', 'someNewProperty'),
    ]);