Minor URL and copy updates#1631

Merged

shiffman merged 2 commits intoCodingTrain:mainfrom

fturmel:PR/minor-fixes

Jul 3, 2024

Commits on Jun 23, 2024

relative Discord links, fix bad 2023 workflow link, minor text and url changes
fturmel
committed
allow `/discord` relative link in content validation tests
fturmel
committed