fix: DataGridCell corner radius resource reference.

Author: NaBian

src/Net_40/HandyControl_Net_40/Themes/Theme.xaml

@@ -11807,7 +11807,7 @@
 		<Setter Property="VerticalContentAlignment" Value="Center" />
 		<Setter Property="HorizontalContentAlignment" Value="Stretch" />
 		<Setter Property="Padding" Value="{StaticResource DefaultControlPadding}" />
-		<Setter Property="hc:BorderElement.CornerRadius" Value="{StaticResource DefaultInputPadding}" />
+		<Setter Property="hc:BorderElement.CornerRadius" Value="{StaticResource DefaultCornerRadius}" />
 		<Setter Property="Template">
 			<Setter.Value>
 				<ControlTemplate TargetType="DataGridCell">

src/Shared/HandyControl_Shared/Themes/Theme.xaml

@@ -1,4 +1,4 @@
-<!--
+<!--
     This code was generated by a tool.
 
     Changes to this file may cause incorrect behavior and will be lost if
@@ -14552,4 +14552,4 @@
 	</Style>
 	<Style BasedOn="{StaticResource RangeSliderBaseStyle}" TargetType="hc:RangeSlider" />
 	<Style BasedOn="{StaticResource SliderBaseStyle}" TargetType="Slider" />
-</ResourceDictionary>
+</ResourceDictionary>