Changed the binding mode of IsOpenProperty from default(one-way) to two way.

Author: Arunachalam406

maui/src/BottomSheet/SfBottomSheet.cs

@@ -338,7 +338,7 @@ public partial class SfBottomSheet : SfView, IParentThemeElement
 			typeof(bool),
 			typeof(SfBottomSheet),
 			false,
-			BindingMode.Default,
+			BindingMode.TwoWay,
 			propertyChanged: OnIsOpenPropertyChanged);
 
 		// Appearance (continued)