Fix container registry specs after changing texts

spec/features/container_registry_spec.rb

@@ -19,7 +19,7 @@ describe "Container Registry" do
     scenario 'user visits container registry main page' do
       visit_container_registry
 
-      expect(page).to have_content 'No container images'
+      expect(page).to have_content 'No container image repositories'
     end
   end