chore(docs): Updated API Reference (v2) (#9437)

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

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

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

@@ -1,5 +1,5 @@
 type: object
-description: The updated's details.
+description: The promotion rule's details.
 x-schemaName: AdminPromotionRule
 required:
   - id
@@ -8,18 +8,19 @@ properties:
   id:
     type: string
     title: id
-    description: The updated's ID.
+    description: The promotion rule's ID.
   description:
     type: string
     title: description
-    description: The updated's description.
+    description: The promotion rule's description.
   attribute:
     type: string
     title: attribute
-    description: The updated's attribute.
+    description: The promotion rule's attribute.
+    example: customer_group_id
   operator:
     type: string
-    description: The updated's operator.
+    description: The rule's operator.
     enum:
       - gt
       - lt
@@ -30,6 +31,8 @@ properties:
       - gte
   values:
     type: array
-    description: The updated's values.
+    description: The rule's values.
+    example:
+      - cusgroup_123
     items:
       $ref: ./BasePromotionRuleValue.yaml