fix pages compatibility

Author: viktorpm

.github/workflows/jekyll.yml

@@ -31,10 +31,8 @@ jobs:
       - name: Setup Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '3.1'
+          ruby-version: '3.0'
           bundler-cache: true
-      - name: Install dependencies
-        run: bundle install
       - name: Setup Pages
         uses: actions/configure-pages@v4
       - name: Build with Jekyll

Gemfile

@@ -4,3 +4,4 @@ source "https://rubygems.org"
 gem "jekyll", "~> 4.3.0"
 gem "jekyll-feed", "~> 0.12"
 gem "jekyll-sitemap"
+gem "webrick", "~> 1.7"

Gemfile.lock

@@ -156,6 +156,7 @@ DEPENDENCIES
   jekyll (~> 4.3.0)
   jekyll-feed (~> 0.12)
   jekyll-sitemap
+  webrick (~> 1.7)
 
 BUNDLED WITH
    2.7.2