Update the Summit 2022 page to a "post-event" format

[dellagustin-sap]

Is your feature request related to a problem? Please describe.
The InnerSource Summit 2022 currently have a "pre-event" look (e.g. Registrations are Now Open, Get Your Ticket Now!), which can be confusion to visitors.

Describe the solution you'd like
The event page should reflect the fact that the event already took place (i.e Link to recordings, replace Registrations are Now Open by something else, remove the link to Get Your Ticket Now!)

Additional context
The recordings can already be reached from the main events page:

[yuhattor]

I assigned this to me

[yuhattor]

#997 and closed now :)