Add hints for the usage of the calendar export
Description
Users can export future pickups as iCal for importing them into external calendar software. However, it might not be intuitively usable, for example
- people might download the file and import it into a calendar instead of adding the URL to the calendar
- calendar software can have long update intervals, especially Google calendar (see https://webapps.stackexchange.com/questions/6313/how-often-does-google-calendar-update-its-other-calendar-feeds, https://support.google.com/calendar/answer/37100?hl=en&ref_topic=1672445).
We could add some hints to the calendar page in order to avoid confusion.
Evidence
https://foodsharing.freshdesk.com/a/tickets/1783
Solution
Maybe a wiki page that describes some typical problems and a link to the wiki on the calendar page