Fixed a typo in the references [ ] generation code.

data/new/exploit.rb.erb

@@ -69,7 +69,7 @@ module Ronin
       <%- end -%>
       <%- unless @references.empty? -%>
       references [
-        <%- @references.each do |url| -%>
+        <%- @references.each.with_index do |url,index| -%>
         <%=   url.inspect -%><% if index < @references.length-1 %>,<% end %>
         <%- end -%>
       ]