Fix concept directory display problem (#11317)

content/zh/docs/concepts/_index.md

@@ -1,10 +1,3 @@
-<!-- ---
-title: Concepts
-main_menu: true
-content_template: templates/concept
-weight: 40
---- -->
-
 ---
 title: 概念
 main_menu: true
@@ -12,6 +5,13 @@ content_template: templates/concept
 weight: 40
 ---
 
+<!-- ---
+title: Concepts
+main_menu: true
+content_template: templates/concept
+weight: 40
+--- -->
+
 {{% capture overview %}}
 
 <!-- The Concepts section helps you learn about the parts of the Kubernetes system and the abstractions Kubernetes uses to represent your cluster, and helps you obtain a deeper understanding of how Kubernetes works. -->