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Configurable

ReplaceItemAttributesWithAttributesRector

Replace deprecated '#item_attributes' with '#attributes' in image_formatter and responsive_image_formatter render arrays

 $element = [
     '#theme' => 'image_formatter',
     '#item' => $item,
-    '#item_attributes' => ['class' => ['my-image']],
+    '#attributes' => ['class' => ['my-image']],
 ];

Configure your rector.php:

<?php

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

return RectorConfig::configure()
    ->withConfiguredRule(ReplaceItemAttributesWithAttributesRector::class, [
        new DrupalIntroducedVersionConfiguration('11.4.0'),
    ]);