chore: add gemfiles

Author: mschoenlaub

.github/workflows/integration.yml

@@ -15,7 +15,7 @@ jobs:
           - '3.2'
         gemfile:
           - gemfiles/rails_6.gemfile
-          - gemfiles/rails_7_7.gemfile
+          - gemfiles/rails_7.gemfile
     steps:
       - name: Repo checkout
         uses: actions/checkout@v3