chore(docs): Updated API Reference (automated) (#9728)

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/components/schemas/AdminPromotion.yaml

@@ -3,6 +3,9 @@ description: The promotion's details.
 x-schemaName: AdminPromotion
 required:
   - id
+  - created_at
+  - updated_at
+  - deleted_at
 properties:
   application_method:
     type: object
@@ -38,3 +41,18 @@ properties:
     description: The ID of the campaign this promotion belongs to.
   campaign:
     $ref: ./AdminCampaign.yaml
+  created_at:
+    type: string
+    format: date-time
+    title: created_at
+    description: The date the promotion was created.
+  updated_at:
+    type: string
+    format: date-time
+    title: updated_at
+    description: The date the promotion was updated.
+  deleted_at:
+    type: string
+    format: date-time
+    title: deleted_at
+    description: The date the promotion was deleted.