update doc-export generator

otc_metadata/data/services.yaml

@@ -800,6 +800,8 @@ service_categories:
     title: Management & Deployment
   - name: security
     title: Security
+  - name: storage
+    title: Storage
 services:
   - repositories:
       - environment: internal
@@ -1094,7 +1096,7 @@ services:
       - environment: public
         repo: opentelekomcloud-docs/identity-access-management
         type: github
-    service_category: md
+    service_category: security
     service_title: Identity and Access Management
     service_type: iam
   - repositories: