docs: docs for next release (#13907)

www/apps/user-guide/app/orders/fulfillments/page.mdx

@@ -141,7 +141,10 @@ To add a shipment for a fulfillment:
 2. Scroll down to the Fulfillment's section. If you have more than one fulfillment, find the fulfillment you're looking for.
 3. Click on the "Mark as shipped" button at the bottom of the section.
 4. In the form that opens:
-    - To add a tracking number, click on the "Add tracking number" button, then enter a tracking number.
+    - To add a tracking number, click on the "Add tracking number" button. This will show the following optional fields:
+        - **Tracking number**: Enter the tracking number provided by the fulfillment provider.
+        - **Tracking URL**: Enter the URL where the customer can track the shipment.
+        - **Label URL**: Enter the URL to a label or receipt for the shipment.
     - If you don’t want the customer to receive a notification that the fulfillment has been shipped, uncheck the “Send notifications” toggle.
 5. Once you’re done, click the Save button.