Configure your rector.php:

<?php

use DrupalRector\Drupal11\Rector\Deprecation\MigrateSqlGetMigrationPluginManagerRector;
use DrupalRector\Rector\ValueObject\DrupalIntroducedVersionConfiguration;
use Rector\Config\RectorConfig;

return RectorConfig::configure()
    ->withConfiguredRule(MigrateSqlGetMigrationPluginManagerRector::class, [
        new DrupalIntroducedVersionConfiguration('11.0.0'),
    ]);