Don't use bundle exec

Author: hsbt

.github/workflows/test.yml

@@ -28,6 +28,6 @@ jobs:
       uses: ruby/setup-ruby@0481980f17b760ef6bca5e8c55809102a0af1e5a # v1.263.0
       with:
         ruby-version: ${{ matrix.ruby }}
-        bundler-cache: true
+    - run: bundle install --jobs 4 --retry 3
     - name: Run test
-      run: bundle exec rake test
+      run: rake test