Revert "DEV: Upgrade Rails to version 7.1 (#27539)"

This reverts commit ca4af53be8cb91aa3fe48ecbcf5a578189be32fa.

spec/requests/embed_controller_spec.rb

@@ -190,6 +190,8 @@ RSpec.describe EmbedController do
     context "with a host" do
       fab!(:embeddable_host)
 
+      before { Jobs.run_immediately! }
+
       it "doesn't raise an error with no referer" do
         get "/embed/comments", params: { embed_url: embed_url }
 
@@ -244,8 +246,6 @@ RSpec.describe EmbedController do
       end
 
       context "with success" do
-        before { Jobs.run_immediately! }
-
         it "tells the topic retriever to work when no previous embed is found" do
           TopicRetriever.any_instance.expects(:retrieve)