Use DynamicResource for TextBox SelectionBrush

Changed SelectionBrush in TextBox style from StaticResource to DynamicResource for SystemAccentColorLight1Brush. This enables automatic updates to the selection color when the resource changes at runtime, improving theme responsiveness.

Author: Jack251970

Flow.Launcher/Themes/Win11Light.xaml

@@ -52,7 +52,7 @@
         <Setter Property="Padding" Value="0 0 50 0" />
         <Setter Property="Foreground" Value="{DynamicResource Color05B}" />
         <Setter Property="CaretBrush" Value="{DynamicResource Color05B}" />
-        <Setter Property="SelectionBrush" Value="{StaticResource SystemAccentColorLight1Brush}" />
+        <Setter Property="SelectionBrush" Value="{DynamicResource SystemAccentColorLight1Brush}" />
         <Setter Property="FontSize" Value="16" />
         <Setter Property="Height" Value="42" />
     </Style>