Nerfs stinger grenades by about 50% (#20864)

Stingers are, in my opinion, one of if not the single most lethal
grenade type in our codebase.
They are a LTL option.
Considering they're also standard armoury equiment, I think it's fair to
bring them down a little. Hopefully they'll see more use.

code/game/objects/items/weapons/grenades/stinger.dm

@@ -1,7 +1,7 @@
 ///Stinger grenade projectile
 /obj/projectile/bullet/rubberball/stinger_ball
 	damage = 2
-	agony = 50
+	agony = 25
 	armor_penetration = 10
 	range_step = 2
 	embed = FALSE
@@ -17,7 +17,7 @@
 	desc = "A stinger grenade, designed to explode and expel rubber balls over an area for less-lethal takedowns. Popular with many law enforcement agencies."
 	icon_state = "stinger"
 
-	var/num_fragments = 100  ///total number of balls produced by the grenade
+	var/num_fragments = 50  ///total number of balls produced by the grenade
 	var/fragment_damage = 2
 	var/damage_step = 3      //projectiles lose a fragment each time they travel this distance. Can be a non-integer.
 	var/explosion_size = 1   ///size of the center explosion