I have a small site that is hosted by Github pages. The content – markdown files – are stored in one directory and on push that directory the site is built and deployed to the <myname>.github.io repository for hosting on GitHub pages. This works well.

I am trying to use GitHub Actions to deploy a PDF built from a .tex file to GitHub Pages. The yml file is available here.

In trying to create a pull request with a push to to gh-pages I get this error in my action:

I have three branches in my repo: