Update Ruby version to `3.4.4` to enable OpenAI Codex by default#3

yasulab merged 4 commits intomaincoderdojo-japan/dojocon2025.coderdojo.jp:mainfrom

update-ruby-3.4.4-to-enable-openai-codex-by-defaultcoderdojo-japan/dojocon2025.coderdojo.jp:update-ruby-3.4.4-to-enable-openai-codex-by-defaultCopy head branch name to clipboard