Update README.md

Author: radzio

README.md

@@ -6,7 +6,7 @@ Simple demo developed with love at [Tango](http://tango.agency) which demonstrat
 
 With this solution it is possible to register for ObservableField's value changes and use it with RxJava operators.
 
-You can read Medium story which explains this concept. [RxJava meets Android Data Binding](https://medium.com/tangoagency/rxjava-meets-android-data-binding-4ca5e1144107#.wv63halu1)
+You can read Medium story which explains this concept - [RxJava meets Android Data Binding](https://medium.com/tangoagency/rxjava-meets-android-data-binding-4ca5e1144107#.wv63halu1).
 
 ### Example code