Merge branch '333856-show-confidentiality-icon-for-child-epics' into 'master'

Render confidential icon in epic tree for epics

See merge request gitlab-org/gitlab!64567

app/graphql/queries/epic/epic_children.query.graphql

@@ -42,6 +42,7 @@ fragment EpicNode on Epic {
   relationPath
   createdAt
   closedAt
+  confidential
   hasChildren
   hasIssues
   group {