Fix Per Key LED Indicator Callbacks (#18450)

Co-authored-by: Dasky <32983009+daskygit@users.noreply.github.com>
Co-authored-by: Nick Brassel <nick@tzarc.org>

keyboards/gmmk/pro/rev1/ansi/keymaps/benschaeff/keymap.c

@@ -99,7 +99,7 @@ bool encoder_update_user(uint8_t index, bool clockwise) {
     return false;
 }
 
-void rgb_matrix_indicators_advanced_user(uint8_t led_min, uint8_t led_max) {
+bool rgb_matrix_indicators_advanced_user(uint8_t led_min, uint8_t led_max) {
     switch(get_highest_layer(layer_state)) {
     // special handling per layer
         case 0:  //layer one
@@ -124,4 +124,5 @@ void rgb_matrix_indicators_advanced_user(uint8_t led_min, uint8_t led_max) {
         default:
             break;
     }
+    return false;
 }