updated assets folder location in readme.
the assets folder is located in app/src/main/ therefore res/assets will confuse some people.
@@ -55,7 +55,7 @@ The simplest way to use it is with LottieAnimationView:
```
Or you can load it programatically in multiple ways.
-From a json asset in res/assets:
+From a json asset in app/src/main/assets:
```java
LottieAnimationView animationView = findViewById(R.id.animation_view);
animationView.setAnimation("hello-world.json");
