Add ruby

Author: pcothenet

.github/workflows/test.yml

@@ -6,6 +6,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 3.1
+          bundler-cache: true
       - name: 1
         uses: ./
         with: