Update 02_Development_environment.md (#383)

Arch Linux doesn't have separate `glfw-wayland` and `glfw-x11` packages now.

Author: driftveil

en/02_Development_environment.md

@@ -246,7 +246,7 @@ sudo dnf install glfw-devel
 ```
 or
 ```bash
-sudo pacman -S glfw-wayland # glfw-x11 for X11 users
+sudo pacman -S glfw
 ```
 
 ### GLM