Easy plus gunpowder recipe

adds a recipe for gunpowder that requires 1 coal, 2 copper bars, 1 gold nugget, 1 iron nugget that gives 3 gunpowder

versions 1.16.5 or older need for this recipe 2 iron bars, 1 coal and 2 gold nuggets, the iron nugget must be replaced by a gold nugget and replace the 2 copper bars with iron bars