Merge branch 'docs/fix-parent-child-pipeline-license' into 'master'

Fix Parent-Child pipeline license to be Core

See merge request gitlab-org/gitlab!23755

doc/ci/parent_child_pipelines.md

@@ -4,7 +4,7 @@ type: reference
 
 # Parent-child pipelines
 
-> [Introduced](https://gitlab.com/gitlab-org/gitlab/issues/16094) in GitLab Starter 12.7.
+> [Introduced](https://gitlab.com/gitlab-org/gitlab/issues/16094) in GitLab 12.7.
 
 As pipelines grow more complex, a few related problems start to emerge: