doc: update www/ruby-rails70 and related package to 7.0.8

devel/ruby-activesupport70
devel/ruby-activemodel70
devel/ruby-activejob70
www/ruby-actionview70
www/ruby-actionpack70
databases/ruby-activerecord70
devel/ruby-activestorage70
mail/ruby-actionmailer70
mail/ruby-actionmailbox70
www/ruby-actioncable70
devel/ruby-railties70
textproc/ruby-actiontext70
www/ruby-rails70

(taca)