Add self note

Can't suspend RGB effects to save CPU work otherwise rgb_matrix_indicator_kb never get's called.

keyboards/nuphy/air75_v2/ansi/ansi.c

@@ -243,6 +243,7 @@ bool process_record_kb(uint16_t keycode, keyrecord_t *record) {
     return true;
 }
 
+// self note - this won't get called if RGB matrix is suspended or if there's no effect
 bool rgb_matrix_indicators_kb(void) {
     if (!rgb_matrix_indicators_user()) {
         return false;