Merge pull request #247400 from dknappettmsft/avd-wording-and-toc-tweak

AVD clarified wording and TOC tweak

Author: v-dirichards

articles/virtual-desktop/TOC.yml

@@ -1,6 +1,7 @@
 - name: Azure Virtual Desktop
   href: index.yml
 - name: Overview
+  expanded: true
   items:
   - name: What is Azure Virtual Desktop?
     displayName: overview, get started

articles/virtual-desktop/prerequisites.md

@@ -149,7 +149,7 @@ You have a choice of operating systems (OS) that you can use for session hosts t
 > [!IMPORTANT]
 > - The following items are not supported:
 >   - 32-bit operating systems.
->   - N, KN, LTSC versions of Windows, or other SKUs not listed in the previous table.
+>   - N, KN, LTSC, and other editions of Windows operating systems not listed in the previous table.
 >   - [Ultra disks](../virtual-machines/disks-types.md#ultra-disks) for the OS disk type.
 >   - [Ephemeral OS disks for Azure VMs](../virtual-machines/ephemeral-os-disks.md).
 >   - [Virtual Machine Scale Sets](../virtual-machine-scale-sets/overview.md).