Clarify the external dependency issue

README.md

@@ -7,7 +7,7 @@ Ruby bindings for [raylib](https://www.raylib.com/), a simple and easy-to-use li
 ## Features
 
 - Feature parity with [raylib 4.5](https://github.com/raysan5/raylib/tree/4.5.0)
-- **NO external dependencies**, all required libraries are [bundled into raylib](https://github.com/raysan5/raylib/tree/master/src/external)
+- **NO external dependencies besides [raylib](https://github.com/raysan5/raylib/tree/4.5.0)**, all required libraries are [bundled into raylib](https://github.com/raysan5/raylib/tree/master/src/external)
 - Multiple platforms supported: **Windows, Linux, MacOS, RPI... and more!**
 - Hardware accelerated with OpenGL (**1.1, 2.1, 3.3, 4.3 or ES 2.0**)
 - **Unique OpenGL abstraction layer** (usable as standalone module): [rlgl](https://github.com/raysan5/raylib/blob/master/src/rlgl.h)