Update lib/assets/javascripts/ajax_pagination.js.erb

Problems with UTF8 encoding in URL
This commit fix problems with UTF8 signs in the URL. I got some
problems with the "snowman workaround" (?utf8=✓)
(see: https://github.com/ronalchn/ajax_pagination/commit/d7ef1615e6c58581ddb65304fbc9073a35eb6c62)