Change location of slash commands docs

doc/workflow/README.md

@@ -7,7 +7,6 @@
 - [GitLab Flow](gitlab_flow.md)
 - [Groups](groups.md)
 - [Keyboard shortcuts](shortcuts.md)
-- [Slash commands](slash_commands.md)
 - [File finder](file_finder.md)
 - [Labels](../user/project/labels.md)
 - [Notification emails](notifications.md)
@@ -15,6 +14,7 @@
 - [Project forking workflow](forking_workflow.md)
 - [Project users](add-user/add-user.md)
 - [Protected branches](../user/project/protected_branches.md)
+- [Slash commands](../user/project/slash_commands.md)
 - [Sharing a project with a group](share_with_group.md)
 - [Share projects with other groups](share_projects_with_other_groups.md)
 - [Web Editor](web_editor.md)