make hotstone drop caverealms:hot_cobble

nodes.lua

@@ -98,6 +98,7 @@ minetest.register_node("illuna:hotstone", {
     groups = {cracky = 2, igniter = 1, stone = 1},
     light_source = 4,
     damage_per_second = 6,
+    drop = "caverealms:hot_cobble",
     sounds = default.node_sound_stone_defaults(),
 })