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: bb74a9f83b84fa0d2836ed09175cac3c671b1042)
Signed-off-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>