[ticket/15884] Add memberlist_body_* events

update events name
update events.md

PHPBB3-15884

phpBB/styles/prosilver/template/memberlist_body.html

@@ -21,7 +21,7 @@
 		<!-- ENDIF -->
 		<p>{GROUP_DESC} {GROUP_TYPE}</p>
 
-		{% EVENT memberlist_body_group_rank_desc_after %}
+		{% EVENT memberlist_body_group_desc_after %}
 
 		<p>
 			<!-- IF AVATAR_IMG -->{AVATAR_IMG}<!-- ENDIF -->