We try to write the documentation at only one place and reuse it as much as possible. For instance, the home page of this documentation (https://orion.readthedocs.io/) is actually pulled from the README.rst and appended with a table of content of the documentation generated automatically. The advantage of having a single source of truth is that it’s vastly easier to find information and keep it up to date.
When you need to reference a page from the documentation on the README.rst, make sure to always point to the stable channel in readthedocs (https://orion.readthedocs.io/en/stable/).
If you need to add a link to a specific page in the documentation that is not yet on the stable channel, make the link to the latest channel (https://orion.readthedocs.io/en/latest/). During the release process the link will be updated to the stable channel.