The zip offered to download ends in -master.zip instead of the version name... which I cannot find in the package anywhere. Don't I need to rename this package with the version appended and then create a checksum – or has this changed? ..or maybe I'm just lost!? 🙂
Towards the bottom,in the section called DSC resource module package format, you should be removing the version folder.
Note that you downloaded a repository from github. That's why you had -master at the end of the file name to denote the master branch. Normally you would get the DSC resource package from the PowerShell Gallery, once you do get it from there, if you look at the folder structure you'll see it correct, but if you want to get it from github for the purposes of delivering it via the pull server to the nodes, you'll have to do those extra steps.