fix chasey xl offsets

vacuum_gambit.p8

@@ -1064,6 +1064,8 @@ xl_chasey=chasey.new{
   width = 12,
   height = 10
  },
+ fire_off_x = 8,
+ fire_off_y = 15,
  hp = 19.5,
  shield = 5,
  boss = true,