Link to group feed from group activity page

CHANGELOG

@@ -39,6 +39,7 @@ v 8.8.0 (unreleased)
   - Create tags using Rugged for performance reasons. !3745
   - API: Expose Issue#user_notes_count. !3126 (Anton Popov)
   - Don't show forks button when user can't view forks
+  - Fix atom feed links and rendering
   - Files over 5MB can only be viewed in their raw form, files over 1MB without highlighting !3718
   - Add support for supressing text diffs using .gitattributes on the default branch (Matt Oakes)
   - Add eager load paths to help prevent dependency load issues in Sidekiq workers. !3724

app/views/groups/_activities.html.haml

@@ -4,7 +4,7 @@
 .nav-block
   - if current_user
     .controls
-      = link_to dashboard_projects_path(:atom, { private_token: current_user.private_token }), class: 'btn rss-btn' do
+      = link_to group_path(@group, format: :atom, private_token: current_user.private_token), class: 'btn rss-btn' do
         %i.fa.fa-rss
   = render 'shared/event_filter'