Update dependency icalendar to v7.0.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
icalendar (changelog)	==7.0.0 → ==7.0.1

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Release Notes

collective/icalendar (icalendar)

v7.0.1

Compare Source

Minor changes

- Setting :attr:`~cal.calendar.Calendar.calendar_name` now also writes ``X-WR-CALNAME``, and setting :attr:`~cal.calendar.Calendar.description` now also writes ``X-WR-CALDESC``, for improved client compatibility. See `Issue #&#8203;918 <https://github.com/collective/icalendar/issues/918>`_.

Bug fixes
~~~~~~~~~

- Make ``typing_extensions`` a dependency. :issue:`1202`

Documentation

• Fixed the version switcher on Read the Docs, and documented the process for a major release. :issue:1194
• Added usage examples for reading calendars from files and URL. :issue:756

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