Update to Minecraft 1.21.5

Updated to Cavernous 2.2.2 and Minecraft 1.21.5

Cavernous needs to be above Terralith in the load order(in the integrated MC Datapack display, not sure about a .json load order for Paxi)

A fix for if you're not using Terralith or another datapack that adds a custom overworld.json file for 1.21.4.

Needs to be higher in the load list than the main(so lower on the in game datapack list or higher on a datapack loader like Paxi)

A fix for if you're not using Terralith or another datapack that adds a custom overworld.json file for 1.21.1.

Needs to be higher in the load list than the main(so lower on the in game datapack list or higher on a datapack loader like Paxi)

Hopefully fixes bug with skeletons not dropping bones/arrows