CI on Ruby 3.1.

Author: gkellogg

.github/workflows/ci.yml

@@ -24,7 +24,8 @@ jobs:
           - 2.6
           - 2.7
           - 3.0
-          - ruby-head # Eventualy
+          - 3.1
+          - ruby-head
           - jruby
     services: 
       virtuoso: