update doc

en/index.html

@@ -149,7 +149,7 @@
         
             
             
-              <a href="https://github.com/alibaba/arthas/blob/master/site/src/site/sphinx/index.md" class="fa fa-github"> Edit on GitHub</a>
+              <a href="https://github.com/alibaba/arthas/blob/master/site/src/site/sphinx/en/index.md" class="fa fa-github"> Edit on GitHub</a>
             
           
         
@@ -251,7 +251,7 @@
         var DOCUMENTATION_OPTIONS = {
             URL_ROOT:'./',
             VERSION:'3.0.5-SNAPSHOT',
-            LANGUAGE:'None',
+            LANGUAGE:'en',
             COLLAPSE_INDEX:false,
             FILE_SUFFIX:'.html',
             HAS_SOURCE:  true,