chore(docs): Updated API Reference (v2) (#9174)

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>

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

@@ -1,5 +1,5 @@
 type: object
-description: SUMMARY
+description: The exchange's details.
 x-schemaName: AdminPostOrderExchangesReqSchema
 required:
   - order_id
@@ -7,7 +7,7 @@ properties:
   order_id:
     type: string
     title: order_id
-    description: The exchange's order id.
+    description: The ID of the order this exchange is created for.
   description:
     type: string
     title: description
@@ -15,7 +15,7 @@ properties:
   internal_note:
     type: string
     title: internal_note
-    description: The exchange's internal note.
+    description: A note viewed only by admin users.
   metadata:
     type: object
-    description: The exchange's metadata.
+    description: The exchange's metadata, can hold custom key-value pairs.