Bump Ruby from 3.3 to 3.4 (#188)

* Update Ruby version to 3.4 in CI workflow

Bumps the Ruby version from 3.3 to 3.4 in the GitHub Actions CI configuration for both Jekyll and Rails jobs to ensure compatibility with the latest Ruby release.

* fix: Add csv for Ruby v2.4

```
bundler: failed to load command: jekyll (/home/runner/work/railsdoc.github.io/railsdoc.github.io/vendor/bundle/ruby/3.4.0/bin/jekyll)
<internal:/opt/hostedtoolcache/Ruby/3.4.6/x64/lib/ruby/3.4.0/rubygems/core_ext/kernel_require.rb>:37:in 'Kernel#require': cannot load such file -- csv (LoadError)
```

* Update Ruby version to 3.4 in deploy workflow

Bumps the Ruby version from 3.3 to 3.4 in the GitHub Actions deploy workflow to ensure compatibility with the latest Ruby features and security updates.

Author: toshimaru

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 3.3
+          ruby-version: 3.4
           bundler-cache: true
       - name: Jekyll Build
         run: bundle exec jekyll build
@@ -40,7 +40,7 @@ jobs:
         run: cd rails && git fetch --depth=1 origin refs/tags/v8*:refs/tags/v8*
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 3.3
+          ruby-version: 3.4
           bundler-cache: true
       - name: Doc Build
         run: rake build

.github/workflows/deploy.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 3.3
+          ruby-version: 3.4
           bundler-cache: true
       - name: Setup Pages
         uses: actions/configure-pages@v5

Gemfile

@@ -1,13 +1,15 @@
 source 'https://rubygems.org'
 
 gem 'jekyll'
+
+gem 'csv'
 gem 'nokogiri', '1.15.6'
 gem 'rake'
 gem 'webrick'
 
 group :jekyll_plugins do
-  gem 'github-pages'
   gem 'faraday', '~> 2.8.1' # For Ruby v2.x
+  gem 'github-pages'
   gem 'jekyll-include-cache'
   gem 'jekyll-toc'
 end

Gemfile.lock

@@ -23,6 +23,7 @@ GEM
     commonmarker (0.23.10)
     concurrent-ruby (1.3.3)
     connection_pool (2.4.1)
+    csv (3.3.5)
     dnsruby (1.72.1)
       simpleidn (~> 0.2.1)
     drb (2.2.1)
@@ -268,6 +269,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  csv
   faraday (~> 2.8.1)
   github-pages
   jekyll