Fabric API — [1.20.1] Fabric API 0.90.0+1.20.1

— Bump version (modmuss50)
— Fix inconsistency of placed feature locations (#3369) (apple502j, modmuss50)
— Add LootTableEvents.LOADED event (#3352) (LLytho, modmuss, Juuz)
— Make some experimental APIs stable. (#3354) (modmuss)