Dune biomes aren't tagged with Sandy

[Neko2n]

Dune biomes don't have the sandy biome dictionary tag? I looked at the AtmosphericBiomes.class file and didn't see Sandy listed. I'd assume a biome that entirely consists of sand would count as sandy, so I assume this was a mistake? It causes it to be incompatible with a lot of mods that use the biome dictionary to spawn or do things, such as Ambience Extras; sandy is the only viable tag to use to get a song to only play in deserts, but the dunes biomes don't have sandy and therefore only consist of dictionary entries taken up by other biomes (wasteland taken up by snowy tundra, hot taken up by jungles, dry taken up by savannas)

If this isn't an oversight or a mistake, I'd like to just suggest adding sandy to the dunes biomes.