Draft: Fix Flatpak
As reported here, Flatpak CI builds are not working. I have fixed them for x8&_64 only. I think the aarch64 buildserver is not working, because the same manifest as is used in this PR builds on Flathub's buildserver.
As reported here, Flatpak CI builds are not working. I have fixed them for x8&_64 only. I think the aarch64 buildserver is not working, because the same manifest as is used in this PR builds on Flathub's buildserver.