Update for new Wayland default (#373)

Author: dathbe

getting-started/installation.md

@@ -164,10 +164,10 @@ You can start MagicMirror² in client mode by manually running the following
 command with the MagicMirror directory:
 `node clientonly --address 192.168.1.5 --port 8080`
 
-### Wayland
+### X11
 
-If you use Wayland. Run `node --run start:wayland` instead of `node --run start`
-to start.
+MagicMirror² now uses Wayland by default. If you use X11, run
+`node --run start:x11` instead of `node --run start` to start.
 
 ### Windows