Upgrade array callable to first class callable
 final class SomeClass
 {
     public function run()
     {
-        $name = [$this, 'name'];
+        $name = $this->name(...);
     }
     public function name()
     {
     }
 }
                        Configure your rector.php:
<?php
use Rector\Config\RectorConfig;
use Rector\Php81\Rector\Array_\FirstClassCallableRector;
return RectorConfig::configure()
    ->withRules([
        FirstClassCallableRector::class,
    ]);