Issue #2924159 followup by jsacksick: Properly access the profile view builder.

modules/order/src/Mail/OrderReceiptMail.php

@@ -58,7 +58,7 @@ class OrderReceiptMail implements OrderReceiptMailInterface {
     ];
     if ($billing_profile = $order->getBillingProfile()) {
       $profile_view_builder = $this->entityTypeManager->getViewBuilder('profile');
-      $body['#billing_information'] = $this->profileViewBuilder->view($billing_profile);
+      $body['#billing_information'] = $profile_view_builder->view($billing_profile);
     }
 
     $params = [