Lawgiver balance adjustments (#5826)

* Changes the stun projectile type from a beam to an electrode. Didn't really make sense why it was shooting stun rays instead of stun 'bullets.' Essentially a flexibility nerf.

* Changes the gun charge consumption for burst firing down from 150 to 50. This is because burst-shooting should be consuming 50 each anyway, making the burst-fire option more useful, since it only had 13 shots when burst-fired previously. This is essentially a buff.

Everything else pertaining to Lawgivers is unchanged.

code/modules/projectiles/guns/energy/lawgiver.dm

@@ -30,7 +30,7 @@
 		),
 		list(
 			mode_name = "rapidfire",
-			charge_cost = 150,
+			charge_cost = 50, // Because it shoots 150 worth of charge anyway.
 			fire_delay = 3,
 			recoil = 1,
 			burst = 3,
@@ -61,7 +61,7 @@
 			move_delay = null,
 			accuracy = 1,
 			dispersion = null,
-			projectile_type = /obj/item/projectile/beam/stun,
+			projectile_type = /obj/item/projectile/energy/electrode,
 			fire_sound = 'sound/weapons/Taser.ogg'
 		),
 		list(