add usage

subjects/binaryaddition/README.md

@@ -25,7 +25,9 @@ func main(){
 	fmt.Println(BinaryAddition(1, 1))
 	fmt.Println(BinaryAddition(1, 2))
 	fmt.Println(BinaryAddition(1, 3))
-    fmt.Println(BinaryAddition(4,4))
+	fmt.Println(BinaryAddition(2, 1))
+	fmt.Println(BinaryAddition(2, 2))
+	fmt.Println(BinaryAddition(2, 3))
 }
 ```