[Modify] Gemfile's Dependencies Problem Fix

Gemfile

@@ -2,9 +2,7 @@ source 'https://rubygems.org'
 
 gem 'webrick'
 # Run Google Page in local using "bundle exec jekyll s "
+gem 'github-pages', group: :jekyll_plugins
 
-group :jekyll_plugins do
-  gem 'github-pages'
-  gem 'jekyll-last-modified-at'
-  gem 'jekyll-sitemap'
-end
+gem 'jekyll-last-modified-at', group: :jekyll_plugins
+gem 'jekyll-sitemap', group: :jekyll_plugins

_config.yml

@@ -5,8 +5,8 @@ description: 'If you are preparing for AWS Cloud Practitioner Exam, this guide w
 show_downloads: false
 
 plugins:
-  - jekyll-last-modified-at
   - jekyll-sitemap
+  - jekyll-last-modified-at
 
 github:
   repository_url: '/'