Added wiki links to README (#3525)

* Added wiki link

* Added second wiki link

README.md

@@ -113,7 +113,7 @@ learning and docs
 
 raylib is designed to be learned using [the examples](https://github.com/raysan5/raylib/tree/master/examples) as the main reference. There is no standard API documentation but there is a [**cheatsheet**](https://www.raylib.com/cheatsheet/cheatsheet.html) containing all the functions available on the library a short description of each one of them, input parameters and result value names should be intuitive enough to understand how each function works. 
 
-Some additional documentation about raylib design can be found in raylib GitHub Wiki. Here are the relevant links:
+Some additional documentation about raylib design can be found in [raylib GitHub Wiki](https://github.com/raysan5/raylib/wiki). Here are the relevant links:
 
  - [raylib cheatsheet](https://www.raylib.com/cheatsheet/cheatsheet.html)
  - [raylib architecture](https://github.com/raysan5/raylib/wiki/raylib-architecture)
@@ -147,4 +147,4 @@ license
 
 raylib is licensed under an unmodified zlib/libpng license, which is an OSI-certified, BSD-like license that allows static linking with closed source software. Check [LICENSE](LICENSE) for further details.
 
-raylib uses internally some libraries for window/graphics/inputs management and also to support different file formats loading, all those libraries are embedded with and are available in [src/external](https://github.com/raysan5/raylib/tree/master/src/external) directory. Check [raylib dependencies LICENSES](https://github.com/raysan5/raylib/wiki/raylib-dependencies) on raylib Wiki for details.
+raylib uses internally some libraries for window/graphics/inputs management and also to support different file formats loading, all those libraries are embedded with and are available in [src/external](https://github.com/raysan5/raylib/tree/master/src/external) directory. Check [raylib dependencies LICENSES](https://github.com/raysan5/raylib/wiki/raylib-dependencies) on [raylib Wiki](https://github.com/raysan5/raylib/wiki) for details.