chore(docs): Updated API Reference (v2) (#9437)

Automated changes by [create-pull-request](https://github.com/peter-evans/create-pull-request) GitHub action

Co-authored-by: Shahed Nasser <27354907+shahednasser@users.noreply.github.com>

www/apps/api-reference/specs/admin/components/schemas/AdminExchangePreviewResponse.yaml

@@ -6,6 +6,6 @@ required:
   - exchange
 properties:
   order_preview:
-    $ref: ./OrderPreview.yaml
+    $ref: ./AdminOrderPreview.yaml
   exchange:
     $ref: ./AdminExchange.yaml