Impossible use of list in markdown paragraph of event

[AbcSxyZ]

## Title of your event

- Begin: dd/mm/yyyy hh:mm UTC+1
- End: dd/mm/yyyy hh:mm UTC+1
- Location: https://link-to-visio.org
- Categories: category 1, category 2

Description of your event.

- List in paragraph which create an error

Error message:

  File "open-calendar/git_calendar/git_calendar.py", line 120, in _extract_event_details
    name, value = field["children"][0]["children"][0]["raw"].split(":", 1)
ValueError: not enough values to unpack (expected 2, got 1)

Error coming from the way parsing is done in GitCalendar.markdown_parser, all list in all content assumed to fields of event (caldav).

Workaround: Do not use markdown list in paragraph of the event description.