Add a link from the permissions table to the subgroups/creating a

subgroup section

doc/user/permissions.md

@@ -216,7 +216,8 @@ group.
 | Delete group epic **(ULTIMATE)**                |       |          |           |            | ✓     |
 | View group Audit Events                         |       |          |           |            | ✓     |
 
-- (1): Groups can be set to allow either Owners or Owners and Maintainers to create subgroups
+- (1): Groups can be set to [allow either Owners or Owners and
+  Maintainers to create subgroups](group/subgroups/index.md#creating-a-subgroup)
 
 ### Subgroup permissions