Log Message:
www/ruby-mechanize: update to 2.7.6

=== 2.7.6

* New Features
  * Mechanize#set_proxy accepts an HTTP URL/URI. (#513)

* Bug fix
  * Fix element(s)_with(search: selector) methods not working for forms, form \ 
fields and frames. (#444)
  * Improve the filename parser for the `Content-Disposition` header. (#496, #517)
  * Accept `Content-Encoding: identity`. (#515)
  * Mechanize::Page#title no longer picks a title in an embeded SVG/RDF element. \ 
(#503)
  * Make Mechanize::Form#has_field? boolean. (#501)