chore(docs): Updated API Reference (automated) (#13794)

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/apps/api-reference/specs/admin/paths/admin_shipping-options.yaml

@@ -707,7 +707,10 @@ post:
     content:
       application/json:
         schema:
-          $ref: ../components/schemas/AdminCreateShippingOption.yaml
+          oneOf:
+            - $ref: ../components/schemas/AdminCreateFlatRateShippingOption.yaml
+            - $ref: ../components/schemas/AdminCreateCalculatedShippingOption.yaml
+          description: The shipping option's details.
   x-codeSamples:
     - lang: JavaScript
       label: JS SDK