[CI] Format code according to conventions (#12772)

Co-authored-by: QMK Bot <hello@qmk.fm>

quantum/split_common/transport.c

@@ -444,7 +444,7 @@ void transport_slave(matrix_row_t master_matrix[], matrix_row_t slave_matrix[])
     led_matrix_set_suspend_state(serial_m2s_buffer.led_suspend_state);
 #    endif
 #    if defined(RGB_MATRIX_ENABLE) && defined(RGB_MATRIX_SPLIT)
-    rgb_matrix_config   = serial_m2s_buffer.rgb_matrix;
+    rgb_matrix_config = serial_m2s_buffer.rgb_matrix;
     rgb_matrix_set_suspend_state(serial_m2s_buffer.rgb_suspend_state);
 #    endif
 }