Fix item tags not being saved when going through a builder

src/main/java/net/minestom/server/item/ItemMetaBuilder.java

@@ -261,6 +261,7 @@ public abstract class ItemMetaBuilder {
     @Contract(value = "_, _ -> new", pure = true)
     public static @NotNull ItemMetaBuilder fromNBT(@NotNull ItemMetaBuilder src, @NotNull NBTCompound nbtCompound) {
         ItemMetaBuilder dest = src.getSupplier().get();
+        dest.nbt = nbtCompound.deepClone();
         NBTUtils.loadDataIntoMeta(dest, nbtCompound);
         return dest;
     }