Correcting a Property Value Mistake (#3712)

HorizontalAlignment property value has been incorrectly mentioned as System.Windows.VerticalAlignment.Stretch. I have corrected it as System.Windows.HorizontalAlignment.Stretch.

Author: Liono2010

xml/System.Windows.Controls/GridResizeBehavior.xml

@@ -42,7 +42,7 @@ The behavior of the <xref:System.Windows.Controls.GridSplitter.ResizeBehavior%2A
   
   - When the <xref:System.Windows.FrameworkElement.HorizontalAlignment%2A> property is set to <xref:System.Windows.HorizontalAlignment.Center?displayProperty=nameWithType>, space is redistributed between the columns that are to the left and right of the column that is specified for the <xref:System.Windows.Controls.GridSplitter>.  
   
-  - When the <xref:System.Windows.FrameworkElement.HorizontalAlignment%2A> property is set to <xref:System.Windows.VerticalAlignment.Stretch?displayProperty=nameWithType>, space is redistributed between the columns that are to the left and right of the column that is specified for the <xref:System.Windows.Controls.GridSplitter>.  
+  - When the <xref:System.Windows.FrameworkElement.HorizontalAlignment%2A> property is set to <xref:System.Windows.HorizontalAlignment.Stretch?displayProperty=nameWithType>, space is redistributed between the columns that are to the left and right of the column that is specified for the <xref:System.Windows.Controls.GridSplitter>.  
   
  ]]></format>
     </remarks>