order_management/*.md: Update REST API Ref link

Author: adriendupuis

docs/commerce/order_management/order_management.md

@@ -13,7 +13,7 @@ From the development perspective, the component enables customization of the ord
 The component exposes the following:
 
 - [PHP API](order_management_api.md) that allows for managing orders
-- [REST API](../../api/rest_api/rest_api_reference/rest_api_reference.html#orders) that helps get order information over HTTP
+- [REST API](/api/rest_api/rest_api_reference/rest_api_reference.html#tag/Orders) that helps get order information over HTTP
 
 ### Order management service
 

docs/commerce/order_management/order_management_api.md

@@ -8,7 +8,7 @@ month_change: false
 
 !!! tip "Order management REST API"
 
-    To learn how to manage orders with the REST API, see the [REST API reference](../../api/rest_api/rest_api_reference/rest_api_reference.html#orders).
+    To learn how to manage orders with the REST API, see the [REST API reference](/api/rest_api/rest_api_reference/rest_api_reference.html#tag/Orders).
 
 To get orders and manage them, use the [`Ibexa\Contracts\OrderManagement\OrderServiceInterface`](/api/php_api/php_api_reference/classes/Ibexa-Contracts-OrderManagement-OrderServiceInterface.html) interface.