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/andrebrait/keymap.c

@@ -253,7 +253,7 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
 }
 
 #ifdef RGB_MATRIX_ENABLE
-void rgb_matrix_indicators_user() {
+bool rgb_matrix_indicators_user(void) {
     if (effect_started_time > 0) {
         /* Render blinking EFFECTS */
         const uint16_t deltaTime = sync_timer_elapsed(effect_started_time);
@@ -289,6 +289,7 @@ void rgb_matrix_indicators_user() {
     if (host_keyboard_led_state().caps_lock) {
         set_rgb_caps_leds();
     }
+    return false;
 }
 
 static void start_effects() {