* ARI - Run cron job more frequently
With ACME Renewal Info (RFC9773 §4.3), fetching renewal window should be more frequent, e.g. in case of revocation incident.
"For instance, a server that needs to revoke certificates within 24 hours of notification of a problem might choose to reserve twelve hours for investigation, six hours for clients to fetch updated RenewalInfo objects, and six hours for clients to perform a renewal."
More flexible option is to run the cron job every hour and only refresh ARI when the last one + Retry-After header is in the past.
* Fix cron job schedule for certificate renewal
* Fix random_hour syntax in cron job installation
* Update Windows task scheduler to run more frequently
Add support for randomized hour and update frequency
Ref:
* [/mo](https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/schtasks-create#to-schedule-a-task-to-run-every-n-hours)
* [/SC HOURLY](https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/schtasks-create#parameters)
* Add padding for StartTime (/ST) in SCHTASKS.exe
* New Banner
Updated README to include responsive images for dark and light modes.
* rebase
* Reset README
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Co-authored-by: ZeroSSL-Andreas <andreas.schuster@hidglobal.com>
