docs: add missing shipping_profile_id in create product snippets (#11443)

* initial

* add link

www/apps/resources/app/commerce-modules/product/extend/page.mdx

@@ -319,6 +319,7 @@ curl -X POST 'localhost:9000/admin/products' \
         "values": ["Default option value"]
       }
     ],
+    "shipping_profile_id": "{shipping_profile_id}",
     "additional_data": {
         "custom_name": "test"
     }
@@ -327,6 +328,8 @@ curl -X POST 'localhost:9000/admin/products' \
 
 Make sure to replace `{token}` with an admin user's JWT token. Learn how to retrieve it in the [API reference](!api!/admin#1-bearer-authorization-with-jwt-tokens).
 
+Also, make sure to replace `{shipping_profile_id}` with an existing shipping profile's ID. You can retrieve one either from the Medusa Admin dashboard or using the [List Shipping Profiles API Route](!api!/admin#shipping-profiles_getshippingprofiles).
+
 The request will return the product's details. You'll learn how to retreive the `custom_name` property with the product's details in the next section.
 
 ---