Mortar Hivebot Nerf Hotfix (#5947)

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## These were meant to be nerfed in the original PR
I forgot to change their porjectile typepath so they use the projectile
that doesn't instantly kill you.

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## Changelog

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:cl:
balance: Instead of using the projectile that instantly kills you even
in heavy armor, the mortar hivebots now use the much more reasonable and
balanced 'mortar' projectile attack
/:cl:

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code/modules/mob/living/simple_mob/subtypes/mechanical/hivebot/ranged_damage.dm

@@ -109,6 +109,7 @@
 	desc = "A hivebot that equipped with a long range magenetic weapon."
 	icon_state = "sniper"
 	icon_living = "sniper"
+	base_attack_cooldown = 60
 	projectiletype = /obj/projectile/bullet/magnetic
 	projectilesound = 'sound/weapons/railgun.ogg'
 	player_msg = "Your attacks are short-ranged, but can <b>arc over obstructions</b> such as allies \
@@ -142,7 +143,7 @@
 	maxHealth = 4 LASERS_TO_KILL // 120 health.
 	health = 4 LASERS_TO_KILL
 
-	reload_max = 5
+	base_attack_cooldown = 5
 
 	ai_holder_type = /datum/ai_holder/simple_mob/ranged/sniper
 	catalogue_data = list(/datum/category_item/catalogue/technology/drone/hivebot/siege)
@@ -199,4 +200,4 @@
 
 	base_attack_cooldown = 60
 
-	projectiletype = /obj/projectile/arc/fragmentation
+	projectiletype = /obj/projectile/arc/fragmentation/mortar