Update mica.md

Author: dongle-the-gadget

hub/apps/design/style/mica.md

@@ -126,7 +126,7 @@ By default, NavigationView in Left mode includes the content layer in its conten
                 Background="Transparent"
                 Height="48"
                 Canvas.ZIndex="1" 
-                Margin="48,8,0,0">
+                Margin="48,0,0,0">
             <StackPanel Orientation="Horizontal">
                 <Image x:Name="AppFontIcon"
                     HorizontalAlignment="Left" 
@@ -261,7 +261,7 @@ To follow the card pattern using a NavigationView you will need to remove the de
                 Background="Transparent"
                 Height="48"
                 Canvas.ZIndex="1" 
-                Margin="48,8,0,0">
+                Margin="48,0,0,0">
             <StackPanel Orientation="Horizontal">
                 <Image x:Name="AppFontIcon"
                     HorizontalAlignment="Left"