chore: Upgrade rails and ruby versions (#2400)

ruby version: 3.0.2
rails version: 6.1.4

config/application.rb

@@ -15,11 +15,6 @@ module Chatwoot
 
     config.autoload_paths << Rails.root.join('lib')
     config.eager_load_paths << Rails.root.join('lib')
-    Rails.autoloaders.main.ignore(Rails.root.join('lib/azure'))
-
-    # This is required in production for zeitwerk to autoload the file
-    config.paths.add File.join('app', 'bot'), glob: File.join('**', '*.rb')
-    config.autoload_paths << Rails.root.join('app/bot/*')
 
     # Settings in config/environments/* take precedence over those specified here.
     # Application configuration can go into files in config/initializers