docs: "Set up Sphinx sitemaps" gives too many choices ;)

I'm working to validate the sitemaps generated in our pages, but am presented with too many choices in the starter pack :)

> It is recommended to generate a sitemap for your documentation using the [sphinx-sitemap](https://sphinx-sitemap.readthedocs.io/en/latest/index.html) extension.

But then, RTD sitemaps are referred to across the doc…

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> Configuring your versioned documentation to use an appropriate version may be sufficient

> if you want comprehensive sitemaps for your documentation and all its versions

Do I want them…?

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I would like to know what's the best practice that I should follow…

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*Reported from: https://canonical-starter-pack.readthedocs-hosted.com/stable/how-to/set-up-sitemaps/*