Fix code block (#2413)

* Update Chinese translation

* cUpdate Chinese translation

* fix code block

content_zh/docs/tasks/traffic-management/request-routing/index.md

@@ -52,7 +52,7 @@ keywords: [流量管理,路由]
     spec:
       hosts:
       - details
-        http:
+      http:
       - route:
         - destination:
             host: details
@@ -67,9 +67,9 @@ keywords: [流量管理,路由]
       gateways:
       - bookinfo-gateway
       - mesh
-        hosts:
+      hosts:
       - productpage
-        http:
+      http:
       - route:
         - destination:
             host: productpage
@@ -83,7 +83,7 @@ keywords: [流量管理,路由]
     spec:
       hosts:
       - ratings
-        http:
+      http:
       - route:
         - destination:
             host: ratings
@@ -97,7 +97,7 @@ keywords: [流量管理,路由]
     spec:
       hosts:
       - reviews
-        http:
+      http:
       - route:
         - destination:
             host: reviews