Ensure that the latest OS patches for Azure Virtual Machine

Azure Virtual Machine does not enable auto OS updates, this may leave them vulnerable.

In Azure Console -

1. Open the Azure Portal and go to Virtual Machines.
2. Choose the Virtual Machine you wish to edit.
3. Under Operations, select Updates.
4. Select the Update settings button and configure as needed.

In Terraform -
Deprecated in favor of azurerm_linux_virtual_machine and azurerm_windows_virtual_machine:

1. In the azurerm_virtual_machine resource, set enable_automatic_upgrades to true.

References:
https://learn.microsoft.com/en-us/azure/virtual-machines
https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/virtual_machine