Add copper nuggets to Drowned Loot table

Copper being renewable is awesome... but the rates you get it from Drowned mobs at are horrendously low and impractical to be farmed at, especially compared to gold or iron farms. A big reason why you never see players making gold farms via drowned is that their drop rates were so horribly low

My recommendation: Consider adding a "copper nugget" drop to drowned as well, similar to zombified piglins.