Install bundler with sudo

Author: a2

.github/workflows/docs.yml

@@ -27,7 +27,7 @@ jobs:
             ${{ runner.os }}-gems-
       - name: Install Bundler
         run: |
-          gem install bundler
+          sudo gem install bundler
           bundle config path vendor/bundle
           bundle install --jobs 4 --retry 3
       - name: Generate Jazzy Docs