[PATCH] docker: Correct the linux/arm64 platform string

[Bin Meng]

The Dockerfile is using linux/arm64 without the /v8 suffix.

Signed-off-by: Bin Meng <bmeng.cn at gmail.com>
---

 doc/build/docker.rst    | 2 +-
 tools/docker/Dockerfile | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/doc/build/docker.rst b/doc/build/docker.rst
index 4974a98d4af..791eb215617 100644
--- a/doc/build/docker.rst
+++ b/doc/build/docker.rst
@@ -36,7 +36,7 @@ To build the image yourself:
 
 .. code-block:: bash
 
-    sudo docker buildx build --platform linux/arm64/v8,linux/amd64 -t your-namespace:your-tag .
+    sudo docker buildx build --platform linux/arm64,linux/amd64 -t your-namespace:your-tag .
 
 Or to use an existing container
 
diff --git a/tools/docker/Dockerfile b/tools/docker/Dockerfile
index 201a1cdbac1..45181ce359a 100644
--- a/tools/docker/Dockerfile
+++ b/tools/docker/Dockerfile
@@ -6,7 +6,7 @@ FROM ubuntu:jammy-20251001
 LABEL org.opencontainers.image.authors="Tom Rini <trini at konsulko.com>"
 LABEL org.opencontainers.image.description=" This image is for building U-Boot inside a container"
 
-# Used by docker to set the target platform: valid values are linux/arm64/v8
+# Used by docker to set the target platform: valid values are linux/arm64
 # and linux/amd64
 ARG TARGETPLATFORM
 
-- 
2.34.1