For cron scheduled runs, GitHub Actions names the run after the workflow
name (unlike Travis which names it after the subject of the most recent
commit on the branch). Having a bunch of runs called "test" made it look
like someone was poking at things manually to debug something, rather
than these being ordinary cron runs.
The crontab "40 1 * * *" is once daily at 01:40 UTC, which is 100
minutes after nightly promotions are kicked off so hopefully the newest
nightly is available by then.