Change location of slash commands docs

doc/workflow/README.md

@@ -8,7 +8,6 @@
 - [Groups](groups.md)
 - [Importing to GitLab](doc/importing/README.md)
 - [Keyboard shortcuts](shortcuts.md)
-- [Slash commands](slash_commands.md)
 - [File finder](file_finder.md)
 - [File lock](../user/project/file_lock.md)
 - [Labels](../user/project/labels.md)
@@ -22,6 +21,7 @@
 - [Fast-forward merge](ff_merge.md)
 - [Rebase before merge](rebase_before_merge.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)
 - [Two-factor Authentication (2FA)](two_factor_authentication.md)