Update the comment based header

Scripts/show-notification.ps1

@@ -1,6 +1,6 @@
 <#
 .SYNOPSIS
-        Show Notification
+        Shows a notification
 .DESCRIPTION
         This PowerShell script shows a toast-message notification for the Windows 10 Notification Center.
 .EXAMPLE
@@ -27,4 +27,4 @@ try {
 } catch {
         "⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
         exit 1
-}
+}