docs: fix events payloads (#14131)

www/utils/generated/oas-output/operations/store/post_store_customers.ts

@@ -112,9 +112,9 @@
  *   - name: customer.created
  *     payload: |-
  *       ```ts
- *       [{
+ *       {
  *         id, // The ID of the customer
- *       }]
+ *       }
  *       ```
  *     description: Emitted when a customer is created.
  *     deprecated: false

www/utils/generated/oas-output/operations/store/post_store_customers_me.ts

@@ -101,9 +101,9 @@
  *   - name: customer.updated
  *     payload: |-
  *       ```ts
- *       [{
+ *       {
  *         id, // The ID of the customer
- *       }]
+ *       }
  *       ```
  *     description: Emitted when a customer is updated.
  *     deprecated: false