fixes #85: update readme with required protocols

README.md

@@ -9,8 +9,10 @@ Open an issue if something is not working, I'm happy to take a look.
 
 # System Requirements
 
-* wayland compositor supporting the following unstable protocols:
+* wayland compositor supporting the following protocols:
   * [`wlr-screencopy-unstable-v1`](https://wayland.app/protocols/wlr-screencopy-unstable-v1)
+  * [`linux-dmabuf-v1](https://wayland.app/protocols/linux-dmabuf-v1)
+  * [`xdg-output-unstable-v1](https://wayland.app/protocols/xdg-output-unstable-v1)
 
    [Sway](https://swaywm.org/), [Hyprland](https://hyprland.org/), and [wayfire](https://wayfire.org/) all meet this criteria.
 * [`vaapi`](https://01.org/temp-linuxgraphics/community/vaapi) encode support, consult your distribution for how to set this up. Known good configurations: