Use a different parameter name in recommendex index

The problem with "recommended" is that it had identical singular and
plural, which means it wasn't clear whether we were using it to refer to
an item of a collection or to refer to the collection itself.

app/components/shared/recommended_index_component.html.erb

@@ -16,10 +16,10 @@
         <span class="show-for-sr"><%= t("shared.recommended_index.hide") %></span>
       <% end %>
 
-      <% recommended.each do |recommended| %>
+      <% recommendations.each do |recommendation| %>
         <div class="small-12 medium-6 large-4 column end">
           <div class="recommendation" data-equalizer-watch>
-            <h3><%= link_to recommended.title, polymorphic_path(recommended) %></h3>
+            <h3><%= link_to recommendation.title, polymorphic_path(recommendation) %></h3>
           </div>
         </div>
       <% end %>

app/components/shared/recommended_index_component.rb

@@ -1,14 +1,14 @@
 class Shared::RecommendedIndexComponent < ApplicationComponent
-  attr_reader :recommended, :disable_recommendations_path, :namespace
+  attr_reader :recommendations, :disable_recommendations_path, :namespace
   use_helpers :current_path_with_query_params
 
-  def initialize(recommended, disable_recommendations_path:, namespace:)
-    @recommended = recommended
+  def initialize(recommendations, disable_recommendations_path:, namespace:)
+    @recommendations = recommendations
     @disable_recommendations_path = disable_recommendations_path
     @namespace = namespace
   end
 
   def render?
-    feature?("user.recommendations") && recommended.present?
+    feature?("user.recommendations") && recommendations.present?
   end
 end