fix: Help center api doc (#7189)

swagger/paths/index.yml

@@ -245,6 +245,35 @@
     $ref: ./application/automation_rule/delete.yml
 
 
+# Help Center
+/api/v1/accounts/{account_id}/portals:
+  parameters:
+    - $ref: '#/parameters/account_id'
+  post:
+    $ref: ./application/portal/create.yml
+  get:
+    $ref: ./application/portal/index.yml
+  patch:
+    $ref: ./application/portal/update.yml
+
+
+# Help Center category
+/api/v1/accounts/{account_id}/portals/{portal_id}/categories:
+  parameters:
+    - $ref: '#/parameters/account_id'
+    - $ref: '#/parameters/portal_id'
+  post:
+    $ref: ./application/category/create.yml
+
+# Help Center article
+/api/v1/accounts/{account_id}/portals/{portal_id}/articles:
+  parameters:
+    - $ref: '#/parameters/account_id'
+    - $ref: '#/parameters/portal_id'
+  post:
+    $ref: ./application/article/create.yml
+
+
 # Conversations
 /api/v1/accounts/{account_id}/conversations/meta:
   $ref: ./application/conversation/meta.yml