Update README.md

Author: Nijamudeen-Mohamed

README.md

@@ -70,6 +70,6 @@ void selectionChanged(DateRangePickerSelectionChangedArgs args) {
 
 **Screenshots**
 
-<img alt="selected date text"  src="http://www.syncfusion.com/uploads/user/kb/flut/flut-891/flut-891_img1.png" width="250" height="300" />|
-<img alt="picker with selected date"  src="http://www.syncfusion.com/uploads/user/kb/flut/flut-891/flut-891_img2.png" width="250" height="300" />|
-<img alt="date details"  src="http://www.syncfusion.com/uploads/user/kb/flut/flut-891/flut-891_img3.png" width="250" height="300" />|
+<img alt="selected date text"  src="http://www.syncfusion.com/uploads/user/kb/flut/flut-891/flut-891_img1.png" width="250" height="350" />|
+<img alt="picker with selected date"  src="http://www.syncfusion.com/uploads/user/kb/flut/flut-891/flut-891_img2.png" width="250" height="350" />|
+<img alt="date details"  src="http://www.syncfusion.com/uploads/user/kb/flut/flut-891/flut-891_img3.png" width="250" height="350" />|