Updated Working on Chrome OS (markdown)

Working-on-Chrome-OS.md

@@ -66,7 +66,7 @@ If raylib was installed with `make install RAYLIB_LIBTYPE=SHARED`
 
     make PLATFORM=PLATFORM_DESKTOP RAYLIB_LIBTYPE=SHARED
 
-A more detailed command for the OpenGL ES GRAPHICS variant on Ubuntu 16.04 is:
+A more detailed command for the OpenGL ES GRAPHICS variant is:
 
     make  PLATFORM=PLATFORM_DESKTOP  GRAPHICS=GRAPHICS_API_OPENGLES_20 RAYLIB_LIBTYPE=SHARED USE_EXTERNAL_GLFW=TRUE \
         CFLAGS="-fPIC -I/usr/include/GL" LDFLAGS='-L/usr/local/lib/raysan5 -lGLESv2 -lglfw3'