docs: add ORA reminder notifications how-to#1446

sarina merged 5 commits intoopenedx:mainopenedx/docs.openedx.org:mainfrom

AhtishamShahid:docs/add-ora-reminders-how-toAhtishamShahid/docs.openedx.org:docs/add-ora-reminders-how-toCopy head branch name to clipboard