better complete checkout message, bug fix

config/sync/commerce_checkout.commerce_checkout_flow.materio_checkout_flow.yml

@@ -42,7 +42,7 @@ configuration:
       weight: 5
     order_summary:
       view: commerce_checkout_order_summary
-      step: complete
+      step: _sidebar
       weight: 6
     coupon_redemption:
       allow_multiple: false