[BUG] End biome vein types are not loaded due to missing '_' & "END" is not correct

[aria1th]

Description:

• All of endstone should be end_stone
• "END" should be replaced with "THEEND"

Steps to Reproduce: check json files. I'll make quick PR for this. Technical Information:

• Minecraft: 1.18.1
• Fabric API: *
• Industrial Revolution: 1.13.6
• Modpack: Any

[GabrielOlvH]

Veins don't exist anymore so this is technically fixed :P Thanks for reporting anyway