[Buildroot] [git commit branch/2025.08.x] docs/manual/getting: fix dead link

[Titouan Christophe]

commit: https://git.buildroot.net/buildroot/commit/?id=3af6b2fe9b02c7063cd0a8b465238b4c135dabd9
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/2025.08.x

When searching for the official git repository in the documentation,
readers are forwarded to the buildroot website Download page with a link
pointing to buildroot.org/download, which returns a 404.

Fix the dead link by adding the missing .html suffix.

Signed-off-by: Alexis Lothoré <alexis.lothore at bootlin.com>
Signed-off-by: Julien Olivain <ju.o at free.fr>
(cherry picked from commit 8845586fc6b33937d996e3300bdbfa558d053af2)
Signed-off-by: Titouan Christophe <titouan.christophe at mind.be>
---
 docs/manual/getting.adoc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/manual/getting.adoc b/docs/manual/getting.adoc
index 51c97d5793..1437a3ccef 100644
--- a/docs/manual/getting.adoc
+++ b/docs/manual/getting.adoc
@@ -32,5 +32,5 @@ vagrant up
 
 If you want to follow development, you can use the daily snapshots or
 make a clone of the Git repository. Refer to the
-http://buildroot.org/download[Download page] of the Buildroot website
+http://buildroot.org/download.html[Download page] of the Buildroot website
 for more details.