updated the config

Reviewed-on: #32
Co-authored-by: dutchie031 <timrorije@gmail.com>

config.lua

@@ -73,6 +73,9 @@ SpearheadConfig = {
         --The location will continously update for the last killed unit.
         markLastContact = false, -- default false
 
+        --If enabled, the stage briefing including the current missions will be shown to players on spawn.
+        briefingOnSpawn = true, -- default true
+
         --AutoStages will continue to the next stage automatically on completion of the missions within the stage. 
         -- If you want to make it so the next stage triggers only when you want to disable it here and manually implement the actions needed.
         --[[