EI S10: add message about Owaec being able to recruit (#8987)

Owaec has a crown but little other indicator that he's a leader, and this scenario requires him to be used to recruit. Make it more obvious to the player.

data/campaigns/Eastern_Invasion/scenarios/10_Dark_Sanctuary.cfg

@@ -2564,7 +2564,11 @@ Nothing is going well. My research has come to a dead end and even the spirits f
         [event]
             name=side 5 turn end
             id=owaec_can_recruit_reminder
-            # in 1.18.2 we'll put a message from Owaec here. For now don't, or else we violate the string freeze.
+            [message]
+                speaker=Owaec
+                #po: this is a reminder to the player that Owaec is a leader and can recruit.
+                message= _ "Gweddry may command the whole of our party, but do not forget that I too can recruit and recall! I will need soldiers to hold the line against these orcs."
+            [/message]
         [/event]
         [event]
             name=recruit,recall