Allow linking to the latest documentation with the specific version

This is more of a "hosting the documentation" kind of issue, and might not be the right place for it. But thought to report it here anyway, since it seems to affect just Barman cloud plugin and I couldn't figure out a better place for it.

Currently it isn't possible to link to the latest plugin version documentation with a version specific link. I.e.
- works
- does not work
- works

This means that when writing documentation like "here's the list of relevant documentation on different software we're using", one can't link to the correct version. Which leads to documentation like "remember to double check that the documentation version matches the version on the list!".

Aucun fichier, test ou point d’entrée n’est indiqué. Commencez par reproduire les URL de documentation fonctionnelle et défaillante, puis localisez la configuration d’hébergement de la documentation versionnée du plugin Barman Cloud. Le travail est terminé lorsque la dernière version du plugin, y compris la 0.9.0, est accessible via un lien de documentation spécifique à la version.

Rédigé par le modèle d'indexation à partir du texte de l'issue.