Model block/scaffolding_unstable has wrong cullface for down side: 
`"cullface": "bottom"` for lines: 112, 121, 130, 139.
Expected value: `"cullface": "down"`, because
`net.minecraft.core.Direction#byName` returns null, when call from`net.minecraft.client.renderer.block.model.BlockElementFace$Desirializer#getCullFacing`
Minecraft ignores name mismatch for Direction, but it causes problems when opening the model file in third-party tools