docs: revise extend models (features) (#10429)

www/apps/book/app/learn/customization/customize-admin/widget/page.mdx

@@ -18,7 +18,7 @@ This chapter covers how to show the brand of a product in the Medusa Admin using
   items={[
     {
       text: "Retrieve Brand of Product API Route",
-      link: "/learn/customization/extend-models/query-linked-records"
+      link: "/learn/customization/extend-features/query-linked-records"
     }
   ]}
 />