Update what-is-app-attach.md

We don't do physical

Author: JimMoyle

articles/virtual-desktop/what-is-app-attach.md

@@ -14,7 +14,7 @@ manager: femila
 
 MSIX is a packaging format that offers many features aimed to improve packaging experience for all Windows apps. To learn more about MSIX, see the [MSIX overview](/windows/msix/overview).
 
-MSIX app attach is a way to deliver MSIX applications to both physical and virtual machines. However, MSIX app attach is different from regular MSIX because it's made especially for supported products, such as Azure Virtual Desktop. This article will describe what MSIX app attach is and what it can do for you.
+MSIX app attach is a way to deliver MSIX applications to Azure Virtual Desktop virtual machines. However, MSIX app attach is different from regular MSIX because it's made especially for supported products, such as Azure Virtual Desktop. This article will describe what MSIX app attach is and what it can do for you.
 
 ## Terminology