Bump Ruby version to 3.4.8

[NEMYSESx]

Issue: Bump Ruby version to 3.4.8

Title: Bump Ruby version to 3.4.8

Description

The Gemfile currently locks the Ruby version to 3.4.2.

ruby '3.4.2'

Newer patch versions of Ruby 3.4 (e.g., 3.4.8) have been released with security fixes and improvements. Contributors installing the latest Ruby version encounter a version mismatch error during setup.

Steps to Reproduce

1. Install Ruby 3.4.8.
2. Run bundle install.
3. Error: Your Ruby version is 3.4.8, but your Gemfile specified 3.4.2.

Proposed Solution

Update the Gemfile to use the latest stable patch version:

- ruby '3.4.2'
+ ruby '3.4.8'

This keeps the project up-to-date with the latest security patches while maintaining strict version consistency across environments.