Update ruby versions

Author: danielfriis

.github/workflows/ci.yml

@@ -11,7 +11,12 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ['3.1', '3.2', '3.3']
+        ruby-version: ['3.1', '3.2', '3.3', '3.4']
+        rails-version: ['rails-7.1', 'rails-7.2', 'rails-8.0']
+        exclude:
+          # Rails 8 requires Ruby 3.2+
+          - ruby-version: '3.1'
+            rails-version: 'rails-8.0'
 
     steps:
     - uses: actions/checkout@v4