Ensure that packages are installable

15.2 Release image for blog post and newsletter, incl. feature image

Create and publish release video for 15.2

15.2 Release social media communication

Present new features and changes to OP Team

Update OpenProject image in openDesk

15.2 Release PR communication: heise and more

Confirm packager build is working across all distributions

Identify new Enterprise add-ons for the release (if relevant)

Create release teaser for 15.2