Adds link to username on admin users index view

spec/features/admin/users_spec.rb

@@ -9,12 +9,18 @@ feature 'Admin users' do
   end
 
   scenario 'Index' do
-    expect(page).to have_content @user.name
+    expect(page).to have_link @user.name
     expect(page).to have_content @user.email
     expect(page).to have_content @admin.name
     expect(page).to have_content @admin.email
   end
 
+  scenario 'The username links to their public profile' do
+    click_link @user.name
+
+    expect(current_path).to eq(user_path(@user))
+  end
+
   scenario 'Search' do
     fill_in :search, with: "Luis"
     click_button 'Search'