Gecko Tail! (my branch was out of date) (#2309)

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## About The Pull Request

yeah i https://github.com/Bubberstation/Bubberstation/pull/2300

## Why It's Good For The Game

## Proof Of Testing

check last pr

## Changelog

🆑
add: New gecko tail!
/🆑

Co-authored-by: Jinshee <manastra2536@gmail.com>
Co-authored-by: LT3 <83487515+lessthnthree@users.noreply.github.com>

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

@@ -20,3 +20,8 @@
 	name = "Rattlesnake"
 	icon_state = "rattlesnake"
 	icon = 'modular_zubbers/icons/customization/tails.dmi'
+
+/datum/sprite_accessory/tails/mammal/wagging/gecko
+	name = "Gecko"
+	icon_state = "gecko"
+	icon = 'modular_zubbers/icons/customization/tails.dmi'