buildx(install): fix typo
buildx(install): fix typo

Signed-off-by: CrazyMax <2eb8101acbc78c0d8bc50c0413737c84f1fc3bdc@users.noreply.github.com>

thaJeztah/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io