Update Ruby to version 3.4.7

[Copilot]

This PR updates the Ruby programming language from version 3.3.6 to the latest stable version 3.4.7 (released October 7, 2025).

Changes

• Updated .ruby-version from 3.3.6 to 3.4.7
• Updated .tool-versions from ruby 3.3.6 to ruby 3.4.7
• Added /vendor/bundle/ to .gitignore to prevent committing local dependencies

Notes

• The GitHub Actions workflow already includes Ruby 3.4 in its test matrix, so no changes were needed to CI configuration
• The airports.gemspec maintains required_ruby_version = ">= 2.6" which is appropriate as it specifies the minimum supported version, not the development version
• Ruby 3.4.7 is the latest stable release and includes performance improvements and security fixes

This update ensures the project is using the most current stable Ruby version while maintaining backward compatibility with Ruby 2.6+.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• www.ruby-lang.org
  • Triggering command: curl -s REDACTED (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

Updating Ruby to the Latest Version

The user wants to update the Ruby programming language to its latest available version in their project.

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