Fixes missing Tranquillite floor damaged texture (ParadiseSS13#31685)

* adds damaged tranq floor, adds damaged icon state for floorcode

* Adds a singular space

Co-authored-by: DGamerL <108773801+DGamerL@users.noreply.github.com>
Signed-off-by: MixityMaxity <189351891+MixityMaxity@users.noreply.github.com>

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Signed-off-by: MixityMaxity <189351891+MixityMaxity@users.noreply.github.com>
Co-authored-by: DGamerL <108773801+DGamerL@users.noreply.github.com>

Author: MixityMaxity

code/game/turfs/simulated/floor/mineral_floors.dm

@@ -225,6 +225,7 @@
 /turf/simulated/floor/mineral/tranquillite
 	name = "silent floor"
 	icon_state = "tranquillite"
+	icons = list("tranquillite", "tranquillite_dam")
 	floor_tile = /obj/item/stack/tile/mineral/tranquillite
 	footstep = null
 	barefootstep = null