security/ruby-sshkit: update to 1.22.1

1.22.1 (2024-04-01)

Bug Fixes

* Explicitly require base64 to fix missing constant error with net-ssh
  7.2.2+ (#532) @mattbrictson

Housekeeping

* Fix failing tests on ruby head (#533) @mattbrictson
* Bump toolmantim/release-drafter from 5.25.0 to 6.0.0 (#530) @dependabot

(taca)