Update README.md

Fixed parenthesis in Typecasting for Kotlin example

Author: 5AbhishekSaxena

README.md

@@ -168,16 +168,16 @@ val unsignedRightShift = a ushr 2
 
 ```java
 if (object instanceof Car) {
+Car car = (Car) object;
 }
-Car car = (Car) object;
 ```
 
 > Kotlin
 
 ```kotlin
 if (object is Car) {
-}
 var car = object as Car
+}
 
 // if object is null
 var car = object as? Car // var car = object as Car?