Update show.html.haml to allow guests to see the Files tab as per...

Update show.html.haml to allow guests to see the Files tab as per https://gitlab.com/gitlab-org/gitlab-ce/issues/30199

app/views/projects/show.html.haml

@@ -12,7 +12,7 @@
 = render "projects/last_push"
 = render "home_panel"
-- if current_user && can?(current_user, :download_code, @project)
+- if can?(current_user, :download_code, @project)
   %nav.project-stats{ class: container_class }
     %ul.nav
       %li