ruby: update to 3.3.4

ruby: update to 3.3.4

Ruby 3.3.4 fixes a regression in Ruby 3.3.3 that dependencies are
missing in the gemspec of some bundled gems: net-pop, net-ftp, net-imap,
and prime. The fix allows Bundler to successfully install those gems on
platforms like Heroku. If your bundle install runs correctly now, you
may not have this issue. Other changes are mostly minor bug fixes.

See: https://www.ruby-lang.org/en/news/2024/07/09/ruby-3-3-4-released/

Signed-off-by: Luiz Angelo Daros de Luca <redacted>