try manuall installing appraisal

Author: thompcd

.github/workflows/ci.yml

@@ -9,8 +9,10 @@ jobs:
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: 'head'
+      - name: Install Appraisal
+        run: gem install bundler && gem install appraisal && bundle install && appraisal install
       - name: Install dependencies
-        run: bundle install && bundle exec appraisal install
+        run: bundle install && bundle install appraisal && bundle exec appraisal install
       - name: Setup Pages
         id: configure-pages
         uses: actions/configure-pages@v5