Use excluding instead of where.not(id:

This method was added in Rails 7.0 and makes the code slihgtly more
readable.

The downside is that it generates two queries instead of one, so it
might generate some confusion when debugging SQL queries. Its impact on
performance is probably negligible.

app/controllers/proposals_controller.rb

@@ -164,7 +164,7 @@ class ProposalsController < ApplicationController
                                       .sort_by_confidence_score
                                       .limit(Setting["featured_proposals_number"])
         if @featured_proposals.present?
-          @resources = @resources.where.not(id: @featured_proposals)
+          @resources = @resources.excluding(@featured_proposals)
         end
       end
     end