FIX: `LocalJumpError` in rake tasks (#14874)

`return` isn't allowed in a block context. A followup to #14865

lib/tasks/posts.rake

@@ -54,7 +54,7 @@ end
 
 desc 'Rebake all posts with a quote using a letter_avatar'
 task 'posts:fix_letter_avatars' => :environment do
-  return unless SiteSetting.external_system_avatars_enabled
+  next unless SiteSetting.external_system_avatars_enabled
 
   search = Post.where("user_id <> -1")
     .where("raw LIKE '%/letter\_avatar/%' OR cooked LIKE '%/letter\_avatar/%'")

lib/tasks/redis.rake

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 task 'redis:clean_up' => ['environment'] do
-  return unless Rails.configuration.multisite
+  next unless Rails.configuration.multisite
 
   dbs = RailsMultisite::ConnectionManagement.all_dbs
   dbs << Discourse::SIDEKIQ_NAMESPACE

lib/tasks/s3.rake

@@ -179,7 +179,7 @@ task 's3:ensure_cors_rules' => :environment do
 
   if !result
     puts "skipping"
-    return
+    next
   end
 
   puts "Assets rules status: #{result[:assets_rules_status]}."

lib/tasks/topics.rake

@@ -84,7 +84,7 @@ end
 task "topics:update_fancy_titles" => :environment do
   if !SiteSetting.title_fancy_entities?
     puts "fancy topic titles are disabled"
-    return
+    next
   end
 
   DB.exec("UPDATE topics SET fancy_title = NULL")