chore(docs): Updated API Reference (v2) (#9666)

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

Co-authored-by: Oli Juhl <59018053+olivermrbl@users.noreply.github.com>
Co-authored-by: Shahed Nasser <27354907+shahednasser@users.noreply.github.com>

www/utils/generated/oas-output/schemas/AdminPostOrderEditsAddItemsReqSchema.ts

@@ -37,6 +37,10 @@
  *         metadata:
  *           type: object
  *           description: The item's metadata, can hold custom key-value pairs.
+ *         compare_at_unit_price:
+ *           type: number
+ *           title: compare_at_unit_price
+ *           description: The original price of the item before a promotion or sale.
  * 
 */