Update README.md

Author: Deepesh22

README.md

@@ -8,10 +8,12 @@ It is a basic calculator app for iOS compatible to any layout and screen size.
 
 ### Screenshots
 
-Portrait -
+Portrait
+
 ![Alt text](https://github.com/Deepesh22/Calculator-iOS/blob/master/screenshots/Simulator%20Screen%20Shot%20-%20iPhone%208%20-%202019-03-04%20at%2012.51.51.png "portrait")
 
 Landscape
+
 ![Alt text](https://github.com/Deepesh22/Calculator-iOS/blob/master/screenshots/Simulator%20Screen%20Shot%20-%20iPhone%208%20-%202019-03-04%20at%2012.52.59.png "landscape")
 
 ### Todos