Fix typo

Author: changeworld

articles/virtual-machines/extensions/vmsnapshot-linux.md

@@ -87,9 +87,9 @@ az backup protection enable-for-vm \
     --policy-name DefaultPolicy
 ```
 
-## Azure Powershell deployment
+## Azure PowerShell deployment
 
-Azure Powershell can be used to enable backup on a virtual machine. Once the backup is configured, first scheduled backup job will install the Vm snapshot extension on the VM.
+Azure PowerShell can be used to enable backup on a virtual machine. Once the backup is configured, first scheduled backup job will install the Vm snapshot extension on the VM.
 
 ```azurepowershell
 $targetVault = Get-AzRecoveryServicesVault -ResourceGroupName "myResourceGroup" -Name "myRecoveryServicesVault"