OCPBUGS-11688: Explained that adding new users is not supported -- Follow Up

Author: Michael Burke

modules/machine-config-overview.adoc

@@ -47,10 +47,11 @@ The kinds of components that MCO can change include:
 - **Configuration files**: Create or overwrite files in the `/var` or `/etc` directory.
 - **systemd units**: Create and set the status of a systemd service or add to an existing systemd service by dropping in additional settings.
 - **users and groups**: Change SSH keys in the passwd section post-installation.
-
++
 [IMPORTANT]
 ====
-Changing SSH keys via machine configs is only supported for the `core` user. It is not supported to add any other user via machine configs.
+* Changing SSH keys by using a machine config is supported only for the `core` user. 
+* Adding new users by using a machine config is not supported.
 ====
 * **kernelArguments**: Add arguments to the kernel command line when {product-title} nodes boot.
 * **kernelType**: Optionally identify a non-standard kernel to use instead of the standard kernel. Use `realtime` to use the RT kernel (for RAN). This is only supported on select platforms.