Add config.action_view.stylesheet_media_default to baseline config

Author: rafaelfranca

guides/source/configuring.md

@@ -1115,6 +1115,7 @@ text/javascript image/svg+xml application/postscript application/x-shockwave-fla
 - `config.action_view.form_with_generates_ids`: `false`
 - `config.action_view.preload_links_header`: `nil`
 - `config.action_view.button_to_generates_button_tag`: `false`
+- `config.action_view.stylesheet_media_default` : `true`
 - `config.active_job.retry_jitter`: `0.0`
 - `config.active_job.skip_after_callbacks_if_terminated`: `false`
 - `config.action_mailbox.queues.incineration`: `:action_mailbox_incineration`