Enchanting table UI does not use textures/item/empty_slot_lapis_lazuli.png

The bug

The lapis lazuli slot in enchanting tables has the empty slot texture modified to accommodate the outline of the item. This is despite the fact that a dedicated empty slot texture exists under textures/item/empty_slot_lapis_lazuli.png as of 23w04a.

How to reproduce

Examining textures/gui/container/enchanting_table.png should reveal that the outline texture is part of the slot/UI texture itself rather than added on top of it as a separate texture.

How to fix

The enchanting table UI texture should have this outline removed, and the UI should instead reference the slot texture and apply it accordingly since it exists.