Log Message:
databases/ruby-sequel: update to 5.81.0

5.81.0 (2024-06-01)

* Fix ignored block warnings in a couple plugin apply methods on Ruby 3.4
  (jeremyevans)

* Skip Ruby internal caller locations when searching for caller locations in
  caller_logging and provenance extensions (jeremyevans)

* Add temporarily_release_connection Database extension for multithreaded
  transactional testing (jeremyevans)