xorg package set has been deprecated

Working-on-GNU-Linux.md

@@ -255,12 +255,12 @@ tar xvf external/5.5.tar.gz -C external/
           pkgs.libGL
 
           # X11 dependencies
-          pkgs.xorg.libX11
-          pkgs.xorg.libX11.dev
-          pkgs.xorg.libXcursor
-          pkgs.xorg.libXi
-          pkgs.xorg.libXinerama
-          pkgs.xorg.libXrandr
+          pkgs.libx11
+          pkgs.libx11.dev
+          pkgs.libxcursor
+          pkgs.libxi
+          pkgs.libxinerama
+          pkgs.libxrandr
 
           # Uncomment the line below if you want to build Raylib with web support
           # pkgs.emscripten