dep: bump puma

also remove the incorrect on_worker_boot block and the needless
before_fork block

config/puma.rb

@@ -24,17 +24,8 @@ plugin :tmp_restart
 plugin :solid_queue if ENV["SOLID_QUEUE_IN_PUMA"]
 
 if ENV.fetch("PREFORK") { !Rails.env.local? }
-  on_worker_boot do
-    Yabeda::ActiveRecord.start_timed_metric_collection_task
-    Hey.deployment.start_timed_report_host_refresh
-  end
-
   # Expose prometheus metrics on port 9394
   activate_control_app
   plugin :yabeda
   plugin :yabeda_prometheus
-
-  before_fork do
-    Process.warmup
-  end
 end