Calendar links in TEAM.md don't work (without a Google account?)

[Erethon]

When I click on the calendar links on the TEAM.md page I'm taken to a generic Google page about their calendar service (https://workspace.google.com/intl/en-US/products/calendar/). This might be because I'm not logged in to a Google account.

I think this is most important for the Public Hours calendar as it's the most public one.

[fricklerhandwerk]

This stuff used to work ~1 year ago, but now apparently one can't get stable links to calendar events any more. Same for the other team pages where we have them.

Maybe time to assess a shared calendar service from the NGI ecosystem. Related: NixOS/infra#231