This document was suggesting a way to version pre-releases
which doesn't match the latest recommendations from the
contributor guide.
(From yocto-docs rev: b51c21e59bd624153f6f9b8bf3cf33329bd25e56)
Signed-off-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>