Fix the URL to the sitemap as part of #423

[stevepiercy]

No change log needed.

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📚 Documentation preview 📚: https://volto-light-theme--429.org.readthedocs.build/

[stevepiercy]

If https://volto-light-theme--429.org.readthedocs.build/robots.txt contains the correct URL of https://volto-light-theme.readthedocs.io/sitemap.xml in RTD, then this passes.

[stevepiercy]

meh, nevermind, I forgot that RTD uses its own robots.txt, so we can't verify it until it merges and builds.

We'll need to look at:

https://volto-light-theme.readthedocs.io/robots.txt

[stevepiercy]

I'm just going to merge it, and see what happens.

[stevepiercy]

No I'm not, I lack sufficient permission. Up to you @sneridagh. lol.

[davisagli]

@stevepiercy I can't tell whether it deployed to RTD after merging or not.

[stevepiercy]

@davisagli it did https://volto-light-theme.readthedocs.io/robots.txt and it has the correct URL now:

Sitemap: https://volto-light-theme.readthedocs.io/sitemap.xml

...which in turn resolves to the sitemap. You got SEO! Let the visits counter soar!

[davisagli]

@stevepiercy thanks!