This commit updates the kube-init.sh script to retrieve the Kubernetes
version using the updated URL: https://dl.k8s.io/release/stable.txt.
The previous URL (https://storage.googleapis.com/kubernetes-release/release/stable.txt)
is no longer valid. This change ensures that the script installs the
correct and up-to-date Kubernetes version by fetching the version
information from the new URL.
Signed-off-by: Ricky Sadowski <richard.j.sadowski@gmail.com>