🚧✅ Ruby head is failing—mark as "experimental"

Author: nevans

.github/workflows/test.yml

@@ -20,10 +20,8 @@ jobs:
         ruby: ${{ fromJson(needs.ruby-versions.outputs.versions) }}
         os: [ ubuntu-latest, macos-latest, windows-latest ]
         experimental: [false]
-        exclude:
-          - { ruby: head, os: windows-latest }
         include:
-          - { ruby: head,             os: windows-latest, experimental: true }
+          - { ruby: head,             experimental: true }
           # - { ruby: jruby,            os: ubuntu-latest,  experimental: true }
           - { ruby: jruby-head,       os: ubuntu-latest,  experimental: true }
           # - { ruby: truffleruby,      os: ubuntu-latest,  experimental: true }