Update diagnostics-linux.md

Author: Jak-MS

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

@@ -145,6 +145,7 @@ az vm extension set --publisher Microsoft.Azure.Diagnostics --name LinuxDiagnost
 
 ```powershell
 Set-AzVMExtension -ResourceGroupName <resource_group_name> -VMName <vm_name> -Location <vm_location> -ExtensionType LinuxDiagnostic -Publisher Microsoft.Azure.Diagnostics -Name LinuxDiagnostic -SettingString $publicSettings -ProtectedSettingString $protectedSettings -TypeHandlerVersion 4.0 -EnableAutomaticUpgrade $true
+```
 
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