Fix Rails 7.1 fixture_path deprecation warning

[MattRogish]

On a clean checkout, when running bundle exec spec I got the following:

Deprecation Warnings:

Rails 7.1 has deprecated the singular fixture_path in favour of an array.You should migrate to plural:

If you need more of the backtrace for any of these deprecations to
identify where to make the necessary changes, you can configure
config.raise_errors_for_deprecations!, and it will turn the
deprecation warnings into errors, giving you the full backtrace.

1 deprecation warning total

I made fixture_paths= / fall back to fixture_path=. rspec has officially made this change upstream, so presumably this warning will persist and/or this functionality will break at some point in the future?

[MattRogish]

I guess maybe the right thing to do is bump rspec and see what happens but that feels like a decision above my pay grade, hence the duct-tape patch above.

[parndt]

I think upgrading rspec sounds like a good idea if you're willing to give it a go 😄