Indexing issue regarding Astro v5 Beta and Astro v4

[ArmandPhilippot]

📋 Explain your issue

I just came across this link after a Google search: https://5-0-0-beta--astro-docs-2.netlify.app/en/getting-started/

The content might be out of date if someone refers to it thinking they're on Astro Docs. And duplicated content between this website and the real Docs website could harm SEO I think... (both use canonical but each with their own URL so I think Google can't determine which one is the real "original" and may suggest the beta website instead of the current docs...)

So I think we should handle this.

And quoting Chris: "We need to handle this and also https://v4.docs.astro.build/ properly and I don’t think we did. We’ll need to figure out if we can actually kill the v5 beta one, or if we need to update how it is indexed"