fix line number

docs/document/Avalonia/docs/Beginner/2. Xml namespace.md

@@ -35,7 +35,7 @@ Generally the default is avalonia namespace which contains built-in components l
 
 `using:AvaloniaApplication` imports the namespace from **specific project**, so `local:` is available to access the types from the project.
 
-```xml{3,9-11}
+```xml{4,8-10}
 <Application xmlns="/~https://github.com/avaloniaui"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              x:Class="AvaloniaApplication.App"