Merge branch 'jh-fix-spelling-of-actioncable' into 'master'

Fix spelling of Action Cable

See merge request gitlab-org/gitlab!61804

doc/user/project/issues/managing_issues.md

@@ -369,7 +369,7 @@ in a comment or description field.
 > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/17589) in GitLab 13.3.
 
 Assignees in the sidebar are updated in real time. This feature is **disabled by default**.
-To enable it, you need to enable [ActionCable in-app mode](https://docs.gitlab.com/omnibus/settings/actioncable.html).
+To enable it, you need to enable [Action Cable in-app mode](https://docs.gitlab.com/omnibus/settings/actioncable.html).
 
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