revert error description (#209)

Co-authored-by: x-shadow-man <1494445739@qq.com>
diff --git a/dubbo-mock-extensions/README.md b/dubbo-mock-extensions/README.md
index 7db308c..0cb5487 100644
--- a/dubbo-mock-extensions/README.md
+++ b/dubbo-mock-extensions/README.md
@@ -9,9 +9,8 @@
 - Add the dependency.
 
 ```xml
-
 <dependency>
-    <groupId>org.apache.dubbo.gatewayorg.apache.dubbo.gateway</groupId>
+    <groupId>org.apache.dubbo.extensions</groupId>
     <artifactId>dubbo-mock-admin</artifactId>
     <version>3.0.0</version>
 </dependency>
diff --git a/dubbo-mock-extensions/README_ch.md b/dubbo-mock-extensions/README_ch.md
index 7aa6f44..e1d2af8 100644
--- a/dubbo-mock-extensions/README_ch.md
+++ b/dubbo-mock-extensions/README_ch.md
@@ -9,9 +9,8 @@
 - 引入依赖
 
 ```xml
-
 <dependency>
-    <groupId>org.apache.dubbo.gatewayorg.apache.dubbo.gateway</groupId>
+    <groupId>org.apache.dubbo.extensions</groupId>
     <artifactId>dubbo-mock-admin</artifactId>
     <version>3.0.0</version>
 </dependency>