Update Ruby on Rails 6.1 pacakges to 6.1.4.1.
Real changes are in Action Pack (www/ruby-actionpack61).
## Rails 6.1.4.1 (August 19, 2021) ##
* [CVE-2021-22942] Fix possible open redirect in Host Authorization middleware.
Specially crafted "X-Forwarded-Host" headers in combination with certain
"allowed host" formats can cause the Host Authorization middleware in Action
Pack to redirect users to a malicious website.