!5577 Fix readme of mobilnetv2 quant

Merge pull request !5577 from chenfei_mindspore/master

model_zoo/official/cv/mobilenetv2_quant/Readme.md

@@ -91,7 +91,7 @@ For FP16 operators, if the input data type is FP32, the backend of MindSpore wil
 
 You can start training using python or shell scripts. The usage of shell scripts as follows:
 
-- Ascend: sh run_train_quant.sh Ascend [DEVICE_NUM] [VISIABLE_DEVICES(0,1,2,3,4,5,6,7)] [RANK_TABLE_FILE] [DATASET_PATH] [CKPT_PATH]
+- Ascend: sh run_train_quant.sh Ascend [DEVICE_NUM] [SERVER_IP(x.x.x.x)] [VISIABLE_DEVICES(0,1,2,3,4,5,6,7)] [DATASET_PATH] [CKPT_PATH]
 
 ### Launch