Merge branch 'eread/maintainer-subgroup-edit' into 'master'

Be specific about how to set subgroup creation permissions

See merge request gitlab-org/gitlab!45849

doc/user/group/subgroups/index.md

@@ -80,7 +80,10 @@ By default, groups created in:
 - GitLab 12.2 or later allow both Owners and Maintainers to create subgroups.
 - GitLab 12.1 or earlier only allow Owners to create subgroups.
 
-This setting can be for any group by an Owner or Administrator.
+The setting can be changed for any group by:
+
+- A group owner. Select the group, and navigate to **Settings > General > Permissions, LFS, 2FA**.
+- An administrator. Navigate to **Admin Area > Overview > Groups**, select the group, and choose **Edit**.
 
 For more information check the
 [permissions table](../../permissions.md#group-members-permissions). For a list