doc: fixed a typo
doc: fixed a typo

Reviewed-by: Bryce Harrington <dd437fc32dcda8cbb48d47baa844ad777493d02b@samsung.com>

tulcod/wayland,abooij/wayland,bitfactor/wayland,eyolfson/wayland,eyolfson/wayland,mchalupa/wayland,tulcod/wayland,sir-murray/wayland,bitfactor/wayland,mchalupa/wayland,abooij/wayland,sir-murray/wayland,mchalupa/wayland,tulcod/wayland,bitfactor/wayland,eyolfson/wayland,abooij/wayland,sir-murray/wayland