Correct term for Mooncake

There is no Azure China government cloud. changing per Susan Wang
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cc: @JnHs

Author: rboucher

articles/azure-portal/azure-portal-safelist-urls.md

@@ -129,7 +129,7 @@ vault.azure.net (Azure Key Vault Service)
 graph.microsoftazure.us
 ```
 
-### [China Government Cloud](#tab/china-government-cloud)
+### [Azure China Cloud](#tab/azure-china-cloud)
 
 ```
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