Also drop Ubuntu Focal support

Update changelog

Merge pull request #100 from NLnetLabs/update-ploutos

Update to Ploutos v9, add Trixie remove Buster

Merge pull request #99 from NLnetLabs/update-dependencies

Make Clippy happy

Update dependencies

Create real release

Change version to rc1

Update version and change log

Update Alpine image version

Merge branch 'main' of github.com:NLnetLabs/krill-sync

Update Cargo.lock.

Bring packages in line with other products (#92)

Update dependencies (#93)