测量电芯电压选择电芯后需要等待事件到100us，原来只有16us

Signed-off-by: huhui <huhui@sharkgulf.com>

Application/app/sox/measure.c

@@ -208,7 +208,7 @@ float get_pack_current(int *current_5238){
 /* get cell's voltage (mV) */
 float get_cell_voltage(int cell){
 	ML5238_SELECT_CELL(cell);
-	delay_us(100);
+	delay_us(700);
 	float adc = adc_sample_avg(ADC_CHAN_VMON, GD32_ADC_READ_TIMES);
 
 	return cell_real_vol((adc / max_gd_adc) * v_gd_ref);