Improve pr config documentation. (#64390)
Improve pr config documentation. (#64390)

note: This config doesn't exist yet, it wasn't properly cherrypicked from another pr into another pr, #64368, so it was added to the config.txt prematurely, but while its here, we might as well clear up a confusion.
tgstation/-tg-station,ShizCalev/tgstation,Cruix/-tg-station,Jordie0608/tgstation,Bawhoppen/-tg-station,tgstation/tgstation,Bawhoppen/-tg-station,Jordie0608/tgstation,Bawhoppen/-tg-station,tgstation/tgstation,Cruix/-tg-station,Jordie0608/tgstation,Cruix/-tg-station,Jordie0608/tgstation,Cruix/-tg-station,Bawhoppen/-tg-station,tgstation/tgstation,tgstation/-tg-station,ShizCalev/tgstation,CPTANT/-tg-station,tgstation/tgstation,Bawhoppen/-tg-station,ShizCalev/tgstation,MicroWorldwide/SS13-TG-station,CPTANT/-tg-station,MicroWorldwide/SS13-TG-station,CPTANT/-tg-station,MicroWorldwide/SS13-TG-station,CPTANT/-tg-station,MicroWorldwide/SS13-TG-station,Cruix/-tg-station,Cruix/-tg-station,MicroWorldwide/SS13-TG-station,Jordie0608/tgstation,Bawhoppen/-tg-station,tgstation/tgstation,ShizCalev/tgstation,MicroWorldwide/SS13-TG-station,ShizCalev/tgstation,CPTANT/-tg-station,tgstation/-tg-station,Bawhoppen/-tg-station,ShizCalev/tgstation,CPTANT/-tg-station,Bawhoppen/-tg-station,ShizCalev/tgstation,Jordie0608/tgstation,Jordie0608/tgstation,MicroWorldwide/SS13-TG-station,tgstation/tgstation,tgstation/-tg-station,Cruix/-tg-station,ShizCalev/tgstation,Cruix/-tg-station,CPTANT/-tg-station,MicroWorldwide/SS13-TG-station,Jordie0608/tgstation,tgstation/tgstation,tgstation/tgstation,CPTANT/-tg-station