buildx failed with: ERROR: failed to solve: process "/bin/sh -c BIN_URL=https://storage.googleapis.com/kubernetes-release/release/v1.28.14/bin/$( echo $TARGETPLATFORM | sed 's@/v[67]$@@' )/kubectl && SHA512=$( wget -qO- \"$BIN_URL.sha512\" ) && wget -qO- \"$BIN_URL\" > /usr/local/bin/kubectl && chmod +x /usr/local/bin/kubectl && sha512sum /usr/local/bin/kubectl | grep \"^$SHA512 \" && kubectl version --client" did not complete successfully: exit code: 1