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/planck/keymaps/charlesrocket/keymap.c

@@ -99,7 +99,7 @@ void set_layer_color(int layer) {
   }
 }
 
-void rgb_matrix_indicators_user(void) {
+bool rgb_matrix_indicators_user(void) {
   if (g_suspend_state || keyboard_config.disable_layer_led) { return; }
   switch (get_highest_layer(layer_state)) {
     case 0:
@@ -119,6 +119,7 @@ void rgb_matrix_indicators_user(void) {
       rgb_matrix_set_color_all(0, 0, 0);
     break;
   }
+    return false;
 }
 
 bool process_record_user(uint16_t keycode, keyrecord_t *record) {