Update 404 Handler to not get stuck

[ccorda]

Looks like something in v12 changed, and now our current redirect will get stuck if it first 404s, then has a redirect added next:
https://github.com/patronage/bubs-next/blob/main/website/src/pages/%5B%5B...slug%5D%5D.js#L96-L100

The solve looks to be to return more than notFound: true:

return {
  notFound: true,
  revalidate: 60,
  props: {},
};

[ccorda]

Original Issue: vercel/next.js#34006

[ccorda]

I've also found an inverse case to be true -- if you have a published page, then convert it's status to draft or trash, it will still show, even after the 60 second revalidate window.