Got rid of fallthrough warnings

watch-faces/io/chirpy_demo_face.c

@@ -261,6 +261,7 @@ bool chirpy_demo_face_loop(movement_event_t event, void *context) {
             if (state->mode != CDM_CHIRPING) {
                 movement_move_to_face(0);
             }
+            // fall through
         default:
             movement_default_loop_handler(event);
             break;