Add missing 'dialog' dependency

README.md

@@ -13,7 +13,7 @@ Flash the system onto the phone (either to an SD card or directly to the eMMC wi
 Open a terminal on the phone (either through SSH, the serial connection or directly on the screen) and run this:
 ```
 # components
-$ sudo apk add waybar bemenu swaylock swayidle squeekboard networkmanager htop pavucontrol bash
+$ sudo apk add waybar bemenu swaylock swayidle squeekboard networkmanager htop pavucontrol bash dialog
 
 # build tools
 $ sudo apk add git make meson ninja cargo linux-headers libinput-dev eudev-dev