Fixed broken link for the easings module

raylib-architecture.md

@@ -18,7 +18,7 @@ Beyond the seven main modules that are described above, there is a small collect
  - [`camera`](https://github.com/raysan5/raylib/blob/master/src/camera.h): 3D Camera system (free, 1st person, 3rd person, custom).
  - [`gestures`](https://github.com/raysan5/raylib/blob/master/src/gestures.h): Touch gesture detection and processing (Tap, Swipe, Drag, Pinch).
  - [`raygui`](https://github.com/raysan5/raygui): Simple IMGUI system with several controls for tools development.
- - [`easings`](https://github.com/raysan5/raylib/blob/master/src/easings.h): Easing functions for animations (based on [Robert Penner](http://robertpenner.com/easing/) implementation).
+ - [`easings`](https://github.com/raysan5/raylib/blob/master/src/extras/easings.h): Easing functions for animations (based on [Robert Penner](http://robertpenner.com/easing/) implementation).
  - [`physac`](https://github.com/victorfisac/Physac): 2D physics library (collision detection, resolution, dynamics et cetera).
 
 Wherever possible, raylib modules were designed to be as decoupled as possible from the other modules. In fact, some modules can be used as standalone libraries, independently of raylib, including the `rlgl` ([example](https://github.com/raysan5/raylib/blob/master/examples/others/rlgl_standalone.c)) and `raudio` ([example](https://github.com/raysan5/raylib/blob/master/examples/others/raudio_standalone.c)) modules.