Links to Daily Builds do not allow updating to Rolling Rhino

[onefish2]

The links provided on this github page to the Ubuntu Daily Builds will not work with the script to turn them into Rolling Rhino builds. So far I have downloaded the ISO images for Ubuntu Desktop and MATE. When I run the script to convert them to Rolling Rhino it fails with this error "Ubuntu 21.04 detected. Switching an interim release to the devel series directly is not supported."