Fix WordPress.WP.I18n.MissingTranslatorsComment errors

[MAILPOET-4524]

mailpoet/lib/Automation/Engine/Builder/UpdateWorkflowController.php

@@ -75,6 +75,7 @@ class UpdateWorkflowController {
 
   private function checkWorkflowStatus(string $status): void {
     if (!in_array($status, [Workflow::STATUS_ACTIVE, Workflow::STATUS_INACTIVE, Workflow::STATUS_DRAFT], true)) {
+      // translators: %s is the status.
       throw UnexpectedValueException::create()->withMessage(__(sprintf('Invalid status: %s', $status), 'mailpoet'));
     }
   }