Fix deprecation warning about fixture_paths

spec/rails_helper.rb

@@ -16,8 +16,9 @@
 ActiveJob::Base.queue_adapter = :inline
 
 RSpec.configure do |config|
-  # Remove this line if you're not using ActiveRecord or ActiveRecord fixtures
-  config.fixture_path = Rails.root.join("spec", "fixtures")
+  # Note that as of Rails 7, "fixture_path" is deprecated. You have to call "fixture_paths.first" instead.
+  config.fixture_paths = []
+  config.fixture_paths << Rails.root.join("spec", "fixtures").to_s
 
   # If you're not using ActiveRecord, or you'd prefer not to run each of your
   # examples within a transaction, remove the following line or assign false