chore(docs): Updated API Reference (automated) (#12461)

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_collections.yaml

@@ -1008,7 +1008,33 @@ post:
     content:
       application/json:
         schema:
-          $ref: ../components/schemas/AdminCreateCollection.yaml
+          allOf:
+            - type: object
+              description: The collection's details.
+              required:
+                - title
+              properties:
+                title:
+                  type: string
+                  title: title
+                  description: The collection's title.
+                handle:
+                  type: string
+                  title: handle
+                  description: The collection's handle.
+                metadata:
+                  type: object
+                  description: The collection's metadata. Can hold custom key-value pairs.
+            - type: object
+              description: The collection's details.
+              properties:
+                additional_data:
+                  type: object
+                  description: >-
+                    Pass additional custom data to the API route. This data is
+                    passed to the underlying workflow under the
+                    `additional_data` parameter.
+          description: the product collection's details.
   x-codeSamples:
     - lang: JavaScript
       label: JS SDK