docs: fix links in extend product guide (#10472)

* docs: fix links in extend product guide

* fix links

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

@@ -43,7 +43,7 @@ This creates a `Custom` data model that has the `id` and `custom_name` propertie
 
 <Note title="Tip">
 
-Learn more about data models in [this guide](!docs!/learn/data-models).
+Learn more about data models in [this guide](!docs!/learn/basics/modules#1-create-data-model).
 
 </Note>
 
@@ -55,7 +55,7 @@ Next, you'll define a module link between the `Custom` and `Cart` data model. A
 
 <Note title="Tip">
 
-Learn more about module links in [this guide](!docs!/learn/module-links).
+Learn more about module links in [this guide](!docs!/learn/advanced-development/module-links).
 
 </Note>