fix ernie_tiny readme typo

README.zh.md

@@ -641,8 +641,8 @@ ERNIE Tiny轻量级模型在公开数据集的效果如下所示，任务均值
 |model|XNLI(acc)|LCQCM(acc)|CHNSENTICORP(acc)|NLPCC-DBQA(mrr/f1)|Average|Latency
 |--|--|--|--|--|--|--|
 |SOTA-before-ERNIE|68.3|83.4|92.2|72.01/-|78.98|-|
-|ERNIE2.0-base|79.7|87.9|95.5|95.7/85.3|89.70|146ms(4.3x)|
-|ERNIE-tiny-subword|75.1|86.1|95.2|92.9/78.6|87.33|633ms(1x)|
+|ERNIE2.0-base|79.7|87.9|95.5|95.7/85.3|89.70|633ms(1x)|
+|ERNIE-tiny-subword|75.1|86.1|95.2|92.9/78.6|87.33|146ms(4.3x)|
 
 
 ## 技术交流