Use rspec on CI

Author: tsugitta

.github/workflows/ci.yml

@@ -63,7 +63,7 @@ jobs:
         env:
           RAILS_ENV: test
           # REDIS_URL: redis://localhost:6379/0
-        run: bin/rails db:test:prepare test test:system
+        run: bundle exec rspec
 
       - name: Keep screenshots from failed system tests
         uses: actions/upload-artifact@v4