mgmt, resource update sample may have bug

[weidongxu-microsoft]

swagger has identity, example also has it.
https://github.com/joannajiang112628/azure-rest-api-specs/blob/c9b373e139e99eb283da5a46196257a57b31e9fe/specification/communication/resource-manager/Microsoft.Communication/preview/2023-04-01-preview/CommunicationServices.json#L824-L851

Also, generated interface does have WithIdentity and WithLinkedDomain.

But sample generated in SDK seems without the identity and linkedDomains. Only tag exists.

    public static void updateResourceToAddAUserAssignedManagedIdentity(
        com.azure.resourcemanager.communication.CommunicationManager manager) {
        CommunicationServiceResource resource =
            manager
                .communicationServices()
                .getByResourceGroupWithResponse(
                    "MyResourceGroup", "MyCommunicationResource", com.azure.core.util.Context.NONE)
                .getValue();
        resource.update().withTags(mapOf("newTag", "newVal")).apply();
    }

[weidongxu-microsoft]

service problem.

json should have identity under parameters, like in create
https://github.com/joannajiang112628/azure-rest-api-specs/blob/c9b373e139e99eb283da5a46196257a57b31e9fe/specification/communication/resource-manager/Microsoft.Communication/preview/2023-04-01-preview/examples/communicationServices/createOrUpdateWithSystemAssignedIdentity.json#L7-L15