revalidate cache to install bundler 4

Author: stefannibrasil

.github/workflows/rspec.yml

@@ -42,8 +42,8 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '3.3.10'
           bundler-cache: true
+          cache-version: 2
 
       - name: Set up JS
         uses: actions/setup-node@v6