Sphinx complains about hardcoded links which can be replaced by an
extlink.
So let's apply its recommendations.
(From yocto-docs rev: a385999029942ae12b6b5d0dddc3fbbd3be13a02)
Signed-off-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Reported-by: Quentin Schulz <foss+yocto@0leil.net>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>