Comment preview tag for Az.SecurityInsights (#19442)

Author: VeryEarly

src/SecurityInsights/Az.SecurityInsights.psd1

@@ -144,7 +144,7 @@ PrivateData = @{
         ReleaseNotes = '* Changed ''Az.SecurityInsights'' to autorest-based module'
 
         # Prerelease string of this module
-        Prerelease = 'preview'
+        # Prerelease = 'preview'
 
         # Flag to indicate whether the module requires explicit user acceptance for install/update/save
         # RequireLicenseAcceptance = $false