Merge branch 'sselhorn-master-patch-78302' into 'master'

Added info to help users find the milestone ID

See merge request gitlab-org/gitlab!59690

doc/api/issues.md

@@ -996,7 +996,7 @@ POST /projects/:id/issues
 | `issue_type`                              | string         | no       | The type of issue. One of `issue`, `incident`, or `test_case`. Default is `issue`. |
 | `labels`                                  | string         | no       | Comma-separated label names for an issue  |
 | `merge_request_to_resolve_discussions_of` | integer        | no       | The IID of a merge request in which to resolve all issues. This fills out the issue with a default description and mark all discussions as resolved. When passing a description or title, these values take precedence over the default values.|
-| `milestone_id`                            | integer        | no       | The global ID of a milestone to assign issue  |
+| `milestone_id`                            | integer        | no       | The global ID of a milestone to assign issue. To find the `milestone_id` associated with a milestone, view an issue with the milestone assigned and [use the API](#single-project-issue) to retrieve the issue's details. |
 | `title`                                   | string         | yes      | The title of an issue |
 | `weight` **(PREMIUM)**                    | integer        | no       | The weight of the issue. Valid values are greater than or equal to 0. |