Update template.yml

Update Ruby to v3

Author: froggleston

.github/workflows/template.yml

@@ -47,7 +47,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '2.7'
+          ruby-version: '3.0'
           bundler-cache: true
 
       - name: Set up Python