website/docs: fix leftover placeholder in release notes (#14377) Update v2025.4.md changed download URL to match version 2025.4. Otherwise it will give a 404 Signed-off-by: finkerle <145992792+finkerle@users.noreply.github.com> Co-authored-by: finkerle <145992792+finkerle@users.noreply.github.com>