Updates README Rx -> Rx2

Author: JoseAlcerreca

README.md

@@ -17,8 +17,8 @@ This project hosts each sample app in separate repository branches. For more inf
 | ------------- | ------------- |
 | [todo‑mvp](https://github.com/googlesamples/android-architecture/tree/todo-mvp/) | Demonstrates a basic [Model‑View‑Presenter](https://en.wikipedia.org/wiki/Model%E2%80%93view%E2%80%93presenter) (MVP) architecture and provides a foundation on which the other samples are built. This sample also acts as a reference point for comparing and contrasting the other samples in this project. |
 | [todo‑mvp‑clean](https://github.com/googlesamples/android-architecture/tree/todo-mvp-clean/) | Uses concepts from [Clean Architecture](https://8thlight.com/blog/uncle-bob/2012/08/13/the-clean-architecture.html). |
-| [todo‑mvp‑dagger](https://github.com/googlesamples/android-architecture/tree/todo-mvp-dagger/) | Uses [Dagger2](https://google.github.io/dagger/) to add support for [dependency injection](https://en.wikipedia.org/wiki/Dependency_injection). |
-| [todo‑mvp‑rxjava](https://github.com/googlesamples/android-architecture/tree/todo-mvp-rxjava/) | Uses [RxJava](https://github.com/ReactiveX/RxJava) to implement concurrency, and abstract the data layer. |
+| [todo‑mvp‑dagger](https://github.com/googlesamples/android-architecture/tree/todo-mvp-dagger/) | Uses [Dagger 2](https://google.github.io/dagger/) to add support for [dependency injection](https://en.wikipedia.org/wiki/Dependency_injection). |
+| [todo‑mvp‑rxjava](https://github.com/googlesamples/android-architecture/tree/todo-mvp-rxjava/) | Uses [RxJava 2](https://github.com/ReactiveX/RxJava) to implement concurrency, and abstract the data layer. |
 | [todo‑mvvm‑databinding](https://github.com/googlesamples/android-architecture/tree/todo-mvvm-databinding/) | Based on the todo-databinding sample, this version incorporates the [Model‑View‑ViewModel](https://en.wikipedia.org/wiki/Model%E2%80%93view%E2%80%93viewmodel) pattern.|