Update changelog

for commits:
https://github.com/wesnoth/wesnoth/commit/385115727fc1a1d64f25712de71c8eb56e7f240b
https://github.com/wesnoth/wesnoth/commit/d7413d1915956d8b56887050fd7077e55388bf6e
https://github.com/wesnoth/wesnoth/commit/ddefdbe53a4ab46347374e42f9459b91dc5e582e
https://github.com/wesnoth/wesnoth/commit/f2346bfb7361579dc5dbe2cee14a91ec20201051