payment/*.md: Update REST API Ref link

Author: adriendupuis

docs/commerce/payment/payment.md

@@ -18,12 +18,12 @@ From the development perspective, the component enables [customization of the pa
 The component exposes the following APIs:
 
 - [Payment method PHP API](payment_method_api.md) that allows for managing payment methods
-- [Payment method REST API](../../api/rest_api/rest_api_reference/rest_api_reference.html#payment-methods) that helps manage payment methods over HTTP
+- [Payment method REST API](/api/rest_api/rest_api_reference/rest_api_reference.html#tag/Payments) that helps manage payment methods over HTTP
 - [Payment PHP API](payment_api.md) that allows for managing payments
 
 ### Services
 
 The Payment package provides the following services, which are entry points for calling backend APIs:
 
 - `Ibexa\Contracts\Payment\PaymentMethodServiceInterface`
-- `Ibexa\Contracts\Payment\PaymentServiceInterface`
+- `Ibexa\Contracts\Payment\PaymentServiceInterface`

docs/commerce/payment/payment_method_api.md

@@ -7,7 +7,7 @@ edition: commerce
 
 !!! tip "Order management REST API"
 
-    To learn how to manage payment methods with the REST API, see the [REST API reference](../../api/rest_api/rest_api_reference/rest_api_reference.html#payment-methods).
+    To learn how to manage payment methods with the REST API, see the [REST API reference](/api/rest_api/rest_api_reference/rest_api_reference.html#tag/Payments).
 
 To get payment methods and manage them, use the `Ibexa\Contracts\Payment\PaymentMethodServiceInterface` interface.