New horn sprite - Biter's Horns (#1555)

## About The Pull Request

Adds in a new set of horns to character customization, the Biter's
Horns.
This is a very self indulgent addition, as these are Kyo's true horns
that I decided to sprite and add on a whim due to the lack of anything
fitting for her.

That's it, it's just those new horns.

## Why It's Good For The Game

I've needed proper horns for Kyo for a while, so I made them myself.
They'll be publically available too, so hey, anyone else who wants to
use Kyo's horns can!

## Proof Of Testing

Tested and the menu shows it, sprite is visible. Very minor addition,
not much room for error.

![image](https://github.com/Bubberstation/Bubberstation/assets/30851775/bd0b7439-347f-4192-a90a-777240dc1fff)

![image](https://github.com/Bubberstation/Bubberstation/assets/30851775/3cfc1ac6-30b0-4487-b6ac-063b55afc406)


## Changelog
🆑
add: Adds Kyo's true horns, named Biter's Horns.
/🆑

modular_zubbers/code/modules/customization/sprite_accessories/horns.dm

@@ -29,6 +29,10 @@
 	name = "Broad Curls"
 	icon_state = "broadcurls"
 
+/datum/sprite_accessory/horns/bubber/biterhorns //Kyo's horns, made by Kyo, for Kyo
+	name = "Biter's Horns"
+	icon_state = "biterhorns"
+
 
 /datum/sprite_accessory/horns/bubber/big
 	icon = 'modular_zubbers/icons/customization/horns_big.dmi'