Rotr - Updated README and default keymap (#9598)

keyboards/rotr/keymaps/default/keymap.c

@@ -1,7 +1,7 @@
 #include QMK_KEYBOARD_H
 
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
-    LAYOUT(
+    [0] = LAYOUT(
         KC_MPRV, KC_MPLY, KC_MNXT
     )
 };

keyboards/rotr/readme.md

@@ -8,10 +8,13 @@ A macro pad with a multipurpose knob.
 * Hardware: [Geekhack](https://geekhack.org/index.php?topic=107104.0)
 
 ## Features:
-* Minimal design with plug and play functionality.
-* Frictionless, solid brass knob.
-* Hot swappable switches.
-* USB C connection.
+* Will ship pre-programmed and ready to use
+* Hot swap sockets
+* USB C
+* RGB LEDs for switches
+* CNC milled aluminium case
+* Solid brass knob
+* Free spinning magnetic rotary encoder
 
 Make example for this keyboard (after setting up your build environment):