SoF S5: tell player that gryphon riders can be recruited

data/campaigns/Sceptre_of_Fire/scenarios/5_Hills_of_the_Shorbear_Clan.cfg

@@ -371,9 +371,12 @@
             message= _ "Shut up, all of you! Attack them!"
         [/message]
 
-        #TODO: Tell the player about this. While Thursagan was trying to
-        #forge the sceptre, the dwarvesh tamed the gryphons and learnt
-        #to ride them.
+        [message]
+            speaker=narrator
+            message= _ "You may now recruit Gryphon Riders."
+            image=wesnoth-icon.png
+        [/message]
+
         [allow_recruit]
             side=1
             type=Gryphon Rider