rails.rb in opentelemetry-instrumentation-rails-0.30.2

- old
+ new

@@ -16,8 +16,9 @@
 end
 
 require 'opentelemetry-instrumentation-action_pack'
 require 'opentelemetry-instrumentation-active_support'
 require 'opentelemetry-instrumentation-action_view'
+require 'opentelemetry-instrumentation-action_mailer'
 require 'opentelemetry-instrumentation-active_record'
 require_relative 'rails/instrumentation'
 require_relative 'rails/version'