I agree that the change log can be handy for people that want to know when a feature was implemented or when they want to update vkd3d many versions at the same time.
I would rename it to CHANGELOG for consistency with the other files ANNOUNCE, AUTHORS, COPYING, LICENSE, INSTALL, README, etc...
Also, a little bit against markdown conventions, maybe we can format the titles for each version like we do in the README: ``` =============================== version titles can go like this =============================== ``` so it is easier to parse as plain text.