Change interest list link

Closes #638 (closed)

app/controllers/admin/projects_controller.rb

@@ -209,7 +209,7 @@ module Admin
           @project,
           'update',
           course: @project.course_edition.display_name,
-          url: project_url(@project)
+          url: course_edition_project_url(@project.course_edition, @project)
         ).notify(students, as: :inform_interested_student)
       end
     end