update to project creation page to reflect default public project setting

app/views/projects/new.html.haml

@@ -2,6 +2,10 @@
   .project-edit-errors
     = render 'projects/errors'
   .project-edit-content
+    - if Gitlab.config.gitlab.default_projects_features.public
+      %p.slead
+        New projects are public by default. Any signed in user can see your project but cannot commit to it unless granted access.
+    - else
       %p.slead
         New projects are private by default. You choose who can see the project and commit to repository.
     %hr