DEV: Upgrade Rails to version 7.1

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Co-authored-by: Jarek Radosz <jradosz@gmail.com>

config/initializers/002-rails_failover.rb

@@ -19,7 +19,7 @@ if defined?(RailsFailover::Redis)
     SiteSetting.refresh!
   end
 
-  RailsFailover::Redis.logger = Rails.logger.chained.first if Rails.logger.respond_to? :chained
+  RailsFailover::Redis.logger = Rails.logger.broadcasts.first
 end
 
 if defined?(RailsFailover::ActiveRecord)