Update articles/virtual-network/ip-services/public-ip-upgrade-vm.md

Thank you for your confirmation!
" AppGW = Application Gateway " so, I accept this suggestion!

Co-authored-by: Michael Bender <[email protected]>

Author: maotsuk

articles/virtual-network/ip-services/public-ip-upgrade-vm.md

@@ -110,7 +110,7 @@ Yes, the process of upgrading a Zonal Basic SKU Public IP to a Zonal Standard SK
 
 ### If I specify a NIC associated with a public IP targeted for migration in the AppGW backend pool, will this script remove it from the pool?
 
-Yes, it will be removed. After running the script, you will need to manually reassign the NIC to the AppGW backend pool.
+Yes, it will be removed. After running the script, you will need to manually reassign the NIC to the Application Gateway backend pool.
 Alternatively, you can avoid this issue by explicitly specifying the private IP address in the backend pool configuration before migration.
 
 ## Use Resource Graph to list VMs with Public IPs requiring upgrade