Merge pull request #632 from datacarpentry/upgrade-ruby

update actions to use ruby 3.0

Author: froggleston

.github/workflows/build-website.yaml

@@ -23,7 +23,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '2.7'
+          ruby-version: '3.0'
 
       - name: Install GitHub Pages, Bundler, and kramdown gems
         run: |

Gemfile

@@ -1,7 +1,10 @@
 source 'https://rubygems.org'
 
 group :jekyll_plugins do
-  gem 'github-pages'
+  gem 'github-pages', '232'
   gem 'jekyll-redirect-from'
   gem 'jekyll-get-json', "~> 1.0.0"
+  gem 'jekyll', '3.10.0'
+  gem 'jekyll-feed', '0.17.0'
+  gem 'webrick', '~> 1.8'
 end