App Service/Functions sovereign cloud availability

We've had support for App Service/Functions available in sovereign clouds for some time now, but the doc wasn't updated. Fixing that now.
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cc: @MARKUSVI

Author: mattchenderson

articles/active-directory/managed-identities-azure-resources/services-support-managed-identities.md

@@ -58,7 +58,7 @@ Refer to the following list to configure managed identity for Azure Virtual Mach
 | Managed identity type | All Generally Available<br>Global Azure Regions | Azure Government | Azure Germany | Azure China 21Vianet |
 | --- | :-: | :-: | :-: | :-: |
 | System assigned | ![Available][check] | ![Available][check] | ![Available][check] | ![Available][check] |
-| User assigned | ![Available][check] | Not available | Not available | Not available |
+| User assigned | ![Available][check] | ![Available][check]  | ![Available][check]  | ![Available][check] |
 
 Refer to the following list to configure managed identity for Azure App Service (in regions where available):
 
@@ -84,7 +84,7 @@ Refer to the following list to use a managed identity with [Azure Blueprints](..
 Managed identity type |All Generally Available<br>Global Azure Regions | Azure Government | Azure Germany | Azure China 21Vianet |
 | --- | :-: | :-: | :-: | :-: |
 | System assigned | ![Available][check] | ![Available][check] | ![Available][check] | ![Available][check] |
-| User assigned | ![Available][check] | Not available | Not available | Not available |
+| User assigned | ![Available][check] | ![Available][check]  | ![Available][check]  | ![Available][check]  |
 
 Refer to the following list to configure managed identity for Azure Functions (in regions where available):