Error when invalid automation is imported could point to docs

Testing #335507

I thought that I could change kind: hourly and kind: daily and import the automation. I didn't know that daily automations were represented with cron expressions. When I tried importing the `kind: daily` automation, the only error I saw was "The property 'schedule.kind' is missing or invalid." I'm not sure where I would find valid examples of that property. Could the error message also link to a doc?