Shorter name for Container Registry tab

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/views/layouts/nav/_project.html.haml

@@ -58,7 +58,7 @@
         = link_to project_container_registry_path(@project), title: 'Container Registry', class: 'shortcuts-container-registry' do
           = icon('hdd-o fw')
           %span
-            Container Registry
+            Registry
 
     - if project_nav_tab? :graphs
       = nav_link(controller: %w(graphs)) do