docs: fix hardcoded link warning messages

Sphinx complains about hardcoded links which can be replaced by an
extlink.

So let's apply its recommendations.

Cc: Quentin Schulz <foss+yocto@0leil.net>
(From yocto-docs rev: dc2ec13cfbe0f20a868108a0bd800c0a875c1796)

Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
Reviewed-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/documentation/ref-manual/system-requirements.rst b/documentation/ref-manual/system-requirements.rst
index d7b7cec283..30294cb27a 100644
--- a/documentation/ref-manual/system-requirements.rst
+++ b/documentation/ref-manual/system-requirements.rst
@@ -322,7 +322,7 @@ If you would prefer not to use the ``install-buildtools`` script, you can instea
 download and run a pre-built buildtools installer yourself with the following
 steps:
 
-1. Locate and download the ``*.sh`` at &YOCTO_RELEASE_DL_URL;/buildtools/
+1. Locate and download the ``*.sh`` at :yocto_dl:`/releases/yocto/yocto-&DISTRO;/buildtools/`
 
 2. Execute the installation script. Here is an example for the
    traditional installer::