[WIP] Update repository name to reflect group rename to pycalendar#1

Copilot wants to merge 1 commit intomainpycalendar/pycal.org:mainfrom

copilot/update-repo-name-to-pycalendarpycalendar/pycal.org:copilot/update-repo-name-to-pycalendarCopy head branch name to clipboard