Interpolation fix for AcrylicBrushPage

Author: NotYoojun

source/iNKORE.UI.WPF.Modern.Gallery/Pages/Controls/Windows/AcrylicPage.xaml.cs

@@ -123,7 +123,7 @@ private void UpdateExampleCode()
     </Grid>
     <ui:AcrylicPanel x:Name=""CustomAcrylicShapeInApp""
         Margin=""12"" Target=""{{Binding ElementName=Acrylic3Grid}}""
-        TintColor=""${CustomAcrylicShapeInApp.TintColor.ToHEX()}"" TintOpacity=""${CustomAcrylicShapeInApp.TintOpacity.ToString()}"" />
+        TintColor=""{CustomAcrylicShapeInApp.TintColor.ToHEX()}"" TintOpacity=""{CustomAcrylicShapeInApp.TintOpacity.ToString()}"" />
 </Grid>
 ";