@gpx1000 @martyj @TomAtkinsonArm trying to diagnose the publishing problem. First, there is an existing CI job jekyll-gh-pages.yml which already tries to publish there but fails. I do not know if this is intended to work, ever did work, or needs to work. It was created by @TomAtkinsonArm over a year ago according to git - Tom, can you comment? Without digging down into the details of the jekyll-gh-pages job, what it attempts to do is publish a subset of the repository files AFAICT.

Second, re authorizing the new Antora CI in this PR, the first thing I notice in the repo settings is that Pages "Build and deployment" is set to source "Github Actions". By contrast the Vulkan-Site settings uses source "Deploy from a branch". It's possible that changing this setting could address the permissions problem, and it would get us onto the same path as Vulkan-Site which does work. Changing it would probably break the jekyll job above even more than it's already broken, but since it's not working anyway, I propose to make that change as a first step.