integration test ruby 3.1

Author: olegantonyan

.github/workflows/ruby.yml

@@ -46,7 +46,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '3.4'
+          ruby-version: '3.1'
           bundler-cache: true
       - run: bin/setup
       - run: bundle exec rake integration_test