Update README.md

Author: reliak

Diff for: README.md

@@ -7,7 +7,7 @@ The MoonPdfLib contains a WPF control that can be included in your application.
 An example for the inclusion is the MoonPdf app (see excerpt below)
 ```xml
 <Window xmlns:mpp="clr-namespace:MoonPdfLib;assembly=MoonPdfLib" ...>
-  <mpp:MoonPdfPanel Background="LightGray" ViewType="SinglePage" PageDisplay="ContinuousPages" PageBorderThickness="0,2,4,2" AllowDrop="True"/>
+  <mpp:MoonPdfPanel Background="LightGray" ViewType="SinglePage" PageDisplay="ContinuousPages" PageMargin="0,2,4,2" AllowDrop="True"/>
 </Window>
 ```