Ruby Nano Bots 2.3.0

New version available on RubyGems:

gem install nano-bots -v 2.3.0

gem 'nano-bots', '~> 2.3'

In this release:

• Adding support for Mistral AI and upgrading gemini-ai #12
• Complying with Nano Bots 2.1.0.
• Adding support for Mistral AI.
• Upgrading to Gemini AI 3.1.0.
• Upgrading Faraday.