docs: added user guide for order editing (#3120)

docs/content/user-guide/orders/payments.md

@@ -47,7 +47,8 @@ To refund an order’s payment:
 3. Click on the Refund button.
 4. In the new window that opens:
     - Enter the Refund amount. It must be less than the Total Paid amount specified in the Payment section.
-    - Choose a reason for the refund and optionally provide a note.
+    - Choose a reason for the refund.
+    - Optionally provide a note for the customer to see.
     - If you don’t want the customer to receive an email that the refund has been made, uncheck the “Send notifications” checkbox.
 5. Once you’re done, click on the Complete button.