UltimaCraft PBR Pre-release 8 (Patreon)

Changelog:

- fixed metallness on polished granite, polished andesite and polished diorite;

- fixed normal map on bricks;

- added specular maps to diamond sword and netherite sword with fire aspect enchantment;

- added specular maps for textures from UltimaCraft (pre-release 8) exept CIT textures and other items;

- other little changes.