Merge branch 'docs-merge-requests-ee' into 'master'

EE Port - Docs: Cleaning up the merge request workflow

See merge request gitlab-org/gitlab-ee!9249

doc/development/contributing/index.md

@@ -119,6 +119,7 @@ This [documentation](merge_request_workflow.md) outlines the current merge reque
 - [Merge request guidelines](merge_request_workflow.md#merge-request-guidelines)
 - [Contribution acceptance criteria](merge_request_workflow.md#contribution-acceptance-criteria)
 - [Definition of done](merge_request_workflow.md#definition-of-done)
+- [Dependencies](merge_request_workflow.md#dependencies)
 
 ## Style guides