fix: Update the URL for POST inbox_members (#4354)

swagger/paths/index.yml

@@ -253,13 +253,17 @@
     - $ref: '#/parameters/inbox_id'
   get:
     $ref: ./application/inboxes/inbox_members/show.yml
-  post:
-    $ref: ./application/inboxes/inbox_members/create.yml
   patch:
     $ref: ./application/inboxes/inbox_members/update.yml
   delete:
     $ref: ./application/inboxes/inbox_members/delete.yml
 
+/api/v1/accounts/{account_id}/inbox_members:
+  parameters:
+    - $ref: '#/parameters/account_id'
+  post:
+    $ref: ./application/inboxes/inbox_members/create.yml
+
 
 
 # Messages
@@ -422,4 +426,4 @@
       type: string
       description: The numeric ID of the user
   get:
-    $ref: './application/reports/conversation/agent.yml'
+    $ref: './application/reports/conversation/agent.yml'