Broken link to cron explanation in documentation

The page contains a link to Quartz in which cron expressions should be explained. This link is broken. I did not find any place in the forum where I can address issues of the documentation, so I hope it is correct that I placed it here.

Hi @cjacob,

thank you for the hint! You can have a look at the Quartz docs here:

I will create a pull request to adjust the documentation.

Hope this helps, Ingo