Comment out ruby-head for now

Author: strzibny

.github/workflows/ci.yml

@@ -22,7 +22,7 @@ jobs:
         ruby:
           - "3.1"
           - "3.2"
-          - "ruby-head"
+          # - "ruby-head"
     steps:
       - name: Install system dependencies
         run: sudo apt-get install imagemagick libmagickwand-dev