doc/api/rest: Update `order_by` support for keyset for users

doc/api/rest/_index.md

@@ -455,7 +455,7 @@ options:
 | [Project jobs](../jobs.md#list-project-jobs)                                   | `order_by=id`, `sort=desc` only                     | Authenticated users only. |
 | [Project audit events](../audit_events.md#retrieve-all-project-audit-events)   | `order_by=id`, `sort=desc` only                     | Authenticated users only. |
 | [Projects](../projects.md)                                                     | `order_by=id` only                                  | Authenticated and unauthenticated users. |
-| [Users](../users.md)                                                           | `order_by=id`, `order_by=name`, `order_by=username` | Authenticated and unauthenticated users.  [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/419556) in GitLab 16.5. |
+| [Users](../users.md)                                                           | `order_by=id`, `order_by=name`, `order_by=username`, `order_by=created_at`, or `order_by=updated_at`. | Authenticated and unauthenticated users.  [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/419556) in GitLab 16.5. |
 | [Registry Repository Tags](../container_registry.md)                           | `order_by=name`, `sort=asc`, or `sort=desc` only.   | Authenticated users only. |
 | [List repository tree](../repositories.md#list-repository-tree)                | N/A                                                 | Authenticated and unauthenticated users. [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/154897) in GitLab 17.1. |