Merge pull request #1310 from alphagov/rails-7.1-cache-format

Update cache format version for Rails 7.1

config/application.rb

@@ -30,7 +30,7 @@ class Application < Rails::Application
     # Once this application is fully deployed to Rails 7.1 and you have no plans to rollback
     # replace the line below with config.active_support.cache_format_version = 7.1
     # This will mean that we can revert back to rails 7.0 if there is an issue
-    config.active_support.cache_format_version = 7.0
+    config.active_support.cache_format_version = 7.1
 
     # Please, add to the `ignore` list any other `lib` subdirectories that do
     # not contain `.rb` files, or that should not be reloaded or eager loaded.