Merge remote-tracking branch 'olleolleolle/patch-1'

* olleolleolle/patch-1:
  Delete gemfiles/Gemfile.rails-6.1.x
  Delete gemfiles/Gemfile.rails-6.0.x
  CI: Omit the 6.x versions of Rails
  CI: Use actions/checkout@v5

Author: radar

.github/workflows/ruby.yml

@@ -20,8 +20,6 @@ jobs:
         ruby_version: [head, 3.4, 3.3, 3.2, 3.1, '3.0', jruby]
         gemfile:
           - Gemfile
-          - gemfiles/Gemfile.rails-6.0.x
-          - gemfiles/Gemfile.rails-6.1.x
           - gemfiles/Gemfile.rails-7.0.x
           - gemfiles/Gemfile.rails-7.1.x
           - gemfiles/Gemfile.rails-7.2.x
@@ -52,7 +50,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with: