App Configuration now supports Azure Availability Zones

[AlexandraKemperMS]

Azure Availability zones(AZ) are now supported by App Configuration in AZ-enabled regions. Each AZ-enabled region consists of 3 or more physically separated datacenters to protect against single datacenter failures. AZ are enabled for all existing and new App Configuration resources automatically at no extra cost. The current supported AZ-enabled regions are: East US, East US 2, Central US, West US 2, North Europe, West Europe, France Central, UK South, Southeast Asia, and Japan East. As more regions are added, please reference the FAQ for updates as well as the azure guide for more information on AZ-enabled regions in Azure.