Add docs for status page /publish quick action

doc/user/project/issues/issue_data_and_actions.md

@@ -311,3 +311,9 @@ Attaching a [Zoom](https://zoom.us) call an issue
 results in a **Join Zoom meeting** button at the top of the issue, just under the header.
 
 Read more how to [add or remove a zoom meeting](associate_zoom_meeting.md).
+
+### Publish an issue **(ULTIMATE)**
+
+> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/30906) in [GitLab Ultimate](https://about.gitlab.com/pricing/) 13.1.
+
+If a status page application is associated with the project, you can use the `/publish` [quick action](../quick_actions.md) to publish the issue. Refer to [GitLab Status Page](../status_page/index.md) for more information.

doc/user/project/quick_actions.md

@@ -51,6 +51,7 @@ The following quick actions are applicable to descriptions, discussions and thre
 | `/move <path/to/project>`             | ✓     |               |      | Move this issue to another project.                                                                                              |
 | `/parent_epic <epic>`                 |       |               | ✓    | Set parent epic to `<epic>`. The `<epic>` value should be in the format of `&epic`, `group&epic`, or a URL to an epic ([introduced in GitLab 12.1](https://gitlab.com/gitlab-org/gitlab/-/issues/10556)). **(ULTIMATE)** |
 | `/promote`                            | ✓     |               |      | Promote issue to epic. **(PREMIUM)**                                                                                            |
+| `/publish`                            | ✓     |               |      | Publish issue to an associated [Status Page](status_page/index.md) ([Introduced in GitLab 13.0](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/30906)) **(ULTIMATE)** |
 | `/reassign @user1 @user2`             | ✓     | ✓             |      | Change assignee. **(STARTER)**                                                                                                   |
 | `/relabel ~label1 ~label2`            | ✓     | ✓             | ✓    | Replace existing labels with those specified.                                                                                  |
 | `/relate #issue1 #issue2`             | ✓     |               |      | Mark issues as related. **(STARTER)**                                                                                            |

doc/user/project/status_page/index.md

@@ -83,12 +83,15 @@ The incident detail page shows detailed information about a particular incident.
 
 To publish an Incident, you first need to create an issue in the Project you enabled the Status Page settings in.
 
-Once this issue is created, a background worker will publish the issue onto the Status Page using the credentials you provided during setup.
+Issues are not published to the Status Page by default. Use the `/publish` [quick action](../quick_actions.md) in an issue to publish the issue. Only [project or group owners](../../permissions.md) are permitted to publish issues.
+
+After the quick action is used, a background worker publishes the issue onto the Status Page using the credentials you provided during setup.
+
 Since all incidents are published publicly, user and group mentions are anonymized with `Incident Responder`,
 and titles of non-public [GitLab references](../../markdown.md#special-gitlab-references) are removed.
 
 NOTE: **Note:**
-Confidential issues are not published. If a published issue is made confidential it will be unpublished.
+Confidential issues can't be published. If you make a published issue confidential, it will be unpublished.
 
 ### Publishing updates