Minor changes

Author: pabel-rh

modules/customizing-the-appearance/proc-customize-rhdh-sidebar-menuitems.adoc

@@ -45,7 +45,7 @@ dynamicPlugins:
           parent: _<my_menu_group>_ # <2>
           priority: 10 # <3>
         default._<menu_group_parent_item_name>_: # <4>
-          icon: _<my_menu_group_icon>_ # <5>
+          icon:  # home | group | category | extension | school | _<your_icon>_ # <5>
           title: _<my_menu_group_title>_ # <6>
           priority: 100 # <7>
 ----