Add in rails-version gemfiles

Author: patch0

.github/workflows/ruby.yml

@@ -18,13 +18,17 @@ jobs:
 
     runs-on: ubuntu-latest
     strategy:
+      fail_fast: false
       matrix:
-        ruby-version: ['2.7', '3.0', '3.1', '3.2', '3.3']
+        ruby-version: ['2.7', '3.1', '3.2']
+        gemfile: [ rails_6.1, rails_7.0 ]
 
     steps:
     - uses: actions/checkout@v2
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
+      env:
+        BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/${{ matrix.gemfile }}.gemfile
       with:
         ruby-version: ${{ matrix.ruby-version }}
         bundler-cache: true # runs 'bundle install' and caches installed gems automatically