Fix wrong word in issues.md

doc/api/issues.md

@@ -357,7 +357,7 @@ GET /projects/:id/issues?confidential=true
 | Attribute           | Type             | Required   | Description                                                                                                                   |
 | ------------------- | ---------------- | ---------- | ----------------------------------------------------------------------------------------------------------------------------- |
 | `id`                | integer/string   | yes        | The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) owned by the authenticated user               |
-| `iids[]`            | integer array    | no         | Return only the milestone having the given `iid`                                                                              |
+| `iids[]`            | integer array    | no         | Return only the issues having the given `iid`                                                                              |
 | `state`             | string           | no         | Return all issues or just those that are `opened` or `closed`                                                                 |
 | `labels`            | string           | no         | Comma-separated list of label names, issues must have all labels to be returned. `None` lists all issues with no labels. `Any` lists all issues with at least one label. `No+Label` (Deprecated) lists all issues with no labels. Predefined names are case-insensitive. |
 | `with_labels_details` | boolean        | no         | If `true`, response will return more details for each label in labels field: `:name`, `:color`, `:description`, `:description_html`, `:text_color`. Default is `false`. `description_html` Introduced in [GitLab 12.7](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/21413) |