Mention Windows Server 2022 for Windows nodes

This updates the Windows nodes in Kubernetes intro paragraph
to clarify it from the beginning that Windows Server 2019
is not a required version to run Windows node.
It also aligns the intro with the detailed Windows OS version
compatibility section below.

Author: mloskot

content/en/docs/concepts/windows/intro.md

@@ -37,7 +37,7 @@ you can deploy worker nodes running either Windows or Linux.
 
 Windows {{< glossary_tooltip text="nodes" term_id="node" >}} are
 [supported](#windows-os-version-support) provided that the operating system is
-Windows Server 2019.
+Windows Server 2019 or Windows Server 2022.
 
 This document uses the term *Windows containers* to mean Windows containers with
 process isolation. Kubernetes does not support running Windows containers with