Update applicationtemplate-instantiate.md

Adding application id for instantiation in sovereign clouds.

Author: jsoveral

api-reference/v1.0/api/applicationtemplate-instantiate.md

@@ -13,7 +13,7 @@ Namespace: microsoft.graph
 
 Add an instance of an application from the [Microsoft Entra application gallery](../resources/applicationtemplate.md) into your directory.
 
-The application template with ID `8adf8e6e-67b2-4cf2-a259-e3dc5476c621` can be used to add a [non-gallery app](/azure/active-directory/manage-apps/add-non-gallery-app) that you can configure different single-sign on (SSO) modes like SAML SSO and password-based SSO.
+The application template with ID `8adf8e6e-67b2-4cf2-a259-e3dc5476c621` can be used to add a [non-gallery app](/azure/active-directory/manage-apps/add-non-gallery-app) that you can configure different single-sign on (SSO) modes like SAML SSO and password-based SSO. For National Clouds use the following: US gov - application template ID `4602d0b4-76bb-404b-bca9-2652e1a39c6d`, China operated by 21Vianet - application template ID `5a532e38-1581-4918-9658-008dc27c1d68`. 
 
 [!INCLUDE [national-cloud-support](../../includes/all-clouds.md)]