Update dir.yaml

Author: Meggielqk

dir.yaml

@@ -440,25 +440,25 @@
     - data-integration/rule-sql-builtin-functions
     - data-integration/rule-sql-jq
     # - data-integration/rule-sql-user-defined-function
-    - title_en: Smart Data Hub
-      title_cn: 数据智能中心
-      title_ja: スマートデータハブ
-      path: data-integration/smart-data-hub
+
+- title_en: Smart Data Hub
+  title_cn: 数据智能中心
+  title_ja: スマートデータハブ
+  path: data-integration/smart-data-hub
+  collapsed: true
+  children:
+    - title_en: Schema Registry
+      title_cn: Schema Registry
+      title_ja: スキーマレジストリ
+      path: data-integration/schema-registry
       collapsed: true
       children:
-        - title_en: Schema Registry
-          title_cn: Schema Registry
-          title_ja: スキーマレジストリ
-          path: data-integration/schema-registry
-          collapsed: true
-          children:
-            - data-integration/schema-registry-example-avro
-            - data-integration/schema-registry-example-protobuf
-            - data-integration/schema-registry-example-external-http
-            - data-integration/sparkplug
-        - data-integration/schema-validation
-        - data-integration/message-transformation
-
+        - data-integration/schema-registry-example-avro
+        - data-integration/schema-registry-example-protobuf
+        - data-integration/schema-registry-example-external-http
+        - data-integration/sparkplug
+    - data-integration/schema-validation
+    - data-integration/message-transformation
 - title_en: Flow Designer
   title_cn: Flow 设计器
   title_ja: Flow デザイナー