Enable Rails 7.0 specs support

spec/dummy/config/application.rb

@@ -14,5 +14,9 @@ module Dummy
     # Application configuration can go into files in config/initializers
     # -- all .rb files in that directory are automatically loaded after loading
     # the framework and any gems in your application.
+
+    ###
+
+    config.active_record.legacy_connection_handling = false if Rails::VERSION::MAJOR > 6
   end
 end