Fix download links to point to stable releases

When updating the image reference from minimal/target to fixedfunction/hmi the link page to try do highlight them. However, this caused a confusion since the new type of images were only available in development releases.

Since now fixedfunction/hmi are available in stable release and since the download page should point to stable release, fix the links accordingly.

Signed-off-by: Walter Lozano walter.lozano@collabora.com