Fix render demo theme

samples/RenderDemo/App.xaml

@@ -3,6 +3,12 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
   <Application.Styles>
     <FluentTheme />
-    <StyleInclude Source="avares://ControlSamples/HamburgerMenu/HamburgerMenu.xaml" />
   </Application.Styles>
+  <Application.Resources>
+    <ResourceDictionary>
+      <ResourceDictionary.MergedDictionaries>
+        <ResourceInclude Source="avares://ControlSamples/HamburgerMenu/HamburgerMenu.xaml" />
+      </ResourceDictionary.MergedDictionaries>
+    </ResourceDictionary>
+  </Application.Resources>
 </Application>