Merge pull request #3545 from AlchemyCMS/ruby-4

CI: Test Ruby 4.0

Author: tvdeyen

.github/workflows/build_test.yml

@@ -102,12 +102,12 @@ jobs:
             database: sqlite
             storage: active_storage
           - rails: "8.0"
-            ruby: "ruby-head"
+            ruby: "4.0"
             database: postgresql
             storage: active_storage
             experimental: true
-
     continue-on-error: ${{ matrix.experimental == true }}
+
     env:
       DB: ${{ matrix.database }}
       DB_USER: alchemy_user