Added Pre-release tag (#27381)

Author: notyashhh

src/DesktopVirtualization/DesktopVirtualization/Az.DesktopVirtualization.psd1

@@ -152,7 +152,7 @@ PrivateData = @{
         ReleaseNotes = '* Upgraded nuget package to signed package.'
 
         # Prerelease string of this module
-        # Prerelease = ''
+        Prerelease = 'preview'
 
         # Flag to indicate whether the module requires explicit user acceptance for install/update/save
         # RequireLicenseAcceptance = $false