Update to the reimagine site to indicate event has passed

[enavajas]

Hello,

We need to update this site (https://reimagine.mozilla.org/en) to indicate that the event has passed. We have flexibility to do this as we think is best, since we no longer have a contract with them.

Please let me know if you have any questions! Thank you :)

[janbrasna]

@enavajas Hi, the event is not served by mozorg website, the correct repo is @mozilla/reimagine 🔖