Fix: Redirect to portal with default locale (#5467)

- Redirect to default locale if URL does not provide the locale param

app/views/public/api/v1/portals/show.html.erb

@@ -1,7 +1,7 @@
 <%= render "public/api/v1/portals/hero", portal: @portal %>
 <div class="max-w-5xl w-full flex-grow mx-auto py-8 px-4">
   <div class="grid grid-cols-1 lg:grid-cols-2 gap-x-32 gap-y-0 lg:gap-y-12">
-    <% @portal.categories.where(locale: params[:locale]).each do |category| %>
+    <% @portal.categories.where(locale: @locale).each do |category| %>
       <%= render "public/api/v1/portals/category-block", category: category, portal: @portal %>
     <% end %>
   </div>