Also hide locked posts

app/controllers/application_controller.rb

@@ -269,6 +269,7 @@ class ApplicationController < ActionController::Base
     @hot_questions = Rails.cache.fetch('hot_questions', expires_in: 4.hours) do
       Rack::MiniProfiler.step 'hot_questions: cache miss' do
         Post.undeleted.where(closed: false)
+            .where(locked: false)
             .where(last_activity: (Rails.env.development? ? 365 : 7).days.ago..DateTime.now)
             .where(post_type_id: [Question.post_type_id, Article.post_type_id])
             .joins(:category).where(categories: { use_for_hot_posts: true })