Use perform_bulk in Podcasts::EnqueueGetEpisodesWorker (#16325)

app/workers/podcasts/enqueue_get_episodes_worker.rb

@@ -5,9 +5,9 @@ module Podcasts
     sidekiq_options queue: :medium_priority, retry: 10
 
     def perform
-      Podcast.published.select(:id).find_each do |podcast|
-        Podcasts::GetEpisodesWorker.perform_async("podcast_id" => podcast.id, "limit" => 5)
-      end
+      # `perform_bulk` expects an array of argument arrays we need to wrap the hashes.
+      job_params = Podcast.published.ids.map { |id| [{ "podcast_id" => id, "limit" => 5 }] }
+      Podcasts::GetEpisodesWorker.perform_bulk(job_params)
     end
   end
 end