Specs do not pass against Rails edge

[tagliala]

Ref: https://github.com/jsonapi-rb/jsonapi-rails/actions/runs/4275332544/jobs/7442603511

Bisected to: rails/rails@e65d41a rails/rails#45957

This will be fixed after the release of rspec/rspec-rails#2631

[tagliala]

I think now there is a legit issue with Rails edge. I will bisect and investigate