D11 compatibillity

Added a fix

After applied this patch #2 with version 2.x, I got an error, and it's failed.

Fixed in this issue https://www.drupal.org/project/dc_ajax_add_cart/issues/3541983 📌 Drupal 10 and Commerce 2.4/3.x compatibility fixes Active and will be available in version 3.0.0.