update stub-mock (#385)

Leishunyu · ralf0131 · commit e03ad801d7cc · 2019-05-31T07:26:16.000+08:00
diff --git a/blog/zh-cn/dubbo-stub-mock.md b/blog/zh-cn/dubbo-stub-mock.md
@@ -195,7 +195,7 @@ public class DemoServiceMock implements DemoService {
 
 
 ```xml
-<dubbo:reference id="demoService" check="false" interface="org.apache.dubbo.samples.mock.api.DemoService" stub="org.apache.dubbo.samples.mock.impl.DemoMock"/>
+<dubbo:reference id="demoService" check="false" interface="org.apache.dubbo.samples.mock.api.DemoService" mock="org.apache.dubbo.samples.mock.impl.DemoMock"/>
 ```
 
 
