- Action Mailer delivery job should modify their `perform` method
  signature in order to receive the new payload that Action Mailer
  sends.

  Before:

  ```ruby
    def perform(mailer, mail_method, delivery_method, *args)
    end
  ```

  After:

  ```ruby
    def perform(mailer, mail_method, delivery_method, args:)
    end
  ```

  This new behaviour was introduced couple years ago in a attempt to
  get rid of the necessity to have a different job for paramterized
  mailers. A deprecation was introduced for custom jobs inheriting
  from `ActionMailer::DeliveryJob` but for jobs that didn't it went
  unnoticed.
  The deprecated behaviour was supposed to be removed in Rails 6.1
  but we couldn't and it got reverted https://github.com/rails/rails/pull/39257