Typo "a Azure"→"an Azure"

https://learn.microsoft.com/en-us/azure/virtual-desktop/configure-host-pool-load-balancing?source=recommendations
https://github.com/MicrosoftDocs/azure-docs/blob/main/articles/virtual-desktop/configure-host-pool-load-balancing.md
#PingMSFTDocs

Author: hyoshioka0128

articles/virtual-desktop/configure-host-pool-load-balancing.md

@@ -1,6 +1,6 @@
 ---
 title: Configure Azure Virtual Desktop load-balancing - Azure
-description: How to configure the load-balancing method for a Azure Virtual Desktop environment.
+description: How to configure the load-balancing method for an Azure Virtual Desktop environment.
 author: Heidilohr
 ms.topic: how-to
 ms.date: 10/12/2020