chore: Set dummy app time zone to berlin

Easier to test time based publishing that way

Author: tvdeyen

spec/dummy/config/application.rb

@@ -26,6 +26,8 @@ class Application < Rails::Application
       config.load_defaults ENV["RAILS_VERSION"] || 8.0
     end
 
+    config.time_zone = "Berlin"
+
     # Settings in config/environments/* take precedence over those specified here.
     # Application configuration can go into files in config/initializers
     # -- all .rb files in that directory are automatically loaded after loading