Adjust the documentation on subgroup permissions

doc/user/permissions.md

@@ -209,13 +209,15 @@ group.
 | Create project in group                         |       |          | ✓         | ✓          | ✓     |
 | Create/edit/delete group milestones             |       |          | ✓         | ✓          | ✓     |
 | Enable/disable a dependency proxy **(PREMIUM)** |       |          | ✓         | ✓          | ✓     |
+| Create subgroup                                 |       |          |           | ✓*         | ✓     |
 | Edit group                                      |       |          |           |            | ✓     |
-| Create subgroup                                 |       |          |           |            | ✓     |
 | Manage group members                            |       |          |           |            | ✓     |
 | Remove group                                    |       |          |           |            | ✓     |
 | Delete group epic **(ULTIMATE)**                |       |          |           |            | ✓     |
 | View group Audit Events                         |       |          |           |            | ✓     |
 
+*Groups can be set to allow either Owners or Owners and maintainers to create subgroups
+
 ### Subgroup permissions
 
 When you add a member to a subgroup, they inherit the membership and