A loop is waiting for /srv/example/post-7-0-schedule-volume/DONE to exist before
declaring the workflow is successfully run. But it is not really until
/srv/example/post-7-0-schedule/contexts is created with the event content and they
will race.
Fixes: https://code.forgejo.org/forgejo/end-to-end/issues/181
Exactly the same as 57fdd1cd49 but for
post-7-0-schedule instead of cron