Update docs/library/mdi/getting-started/windows.mdx

docs/library/mdi/getting-started/windows.mdx

@@ -22,9 +22,8 @@ If you wanted to display the icon at `48x48` place the SVG path data in place of
 To add it to your project add the webfont file and set it's build action to `Content`.
 In your `App.xaml` file add like this, modify according to your path, in the example it's placed inside the Assets folder.
 
-```
+```xml
 <FontFamily x:Key="IconFont">ms-appx:///Assets/materialdesignicons-webfont.ttf#Material Design Icons</FontFamily>
-```
 
 
 ## MahApps.Metro.IconPacks