Upgrade Kubernetes cluster from v1.23 to v1.24 or later

Prepare

1. Modify configmap kubeadm-config

kubectl -n kube-system edit cm kubeadm-config

## Delete the removed featuregate: TTLAfterFinished=true
## There are three places for feature-gates in this configmap.

2. Modify configmap kubelet-config-1.23

kubectl -n kube-system edit cm kubelet-config-1.23 

## Delete the removed featuregate: TTLAfterFinished=true

Upgrade

1. Download latest kubekey

curl -sSL https://get-kk.kubesphere.io | sh -

2. Start upgrade

./kk upgrade -f config-sample.yaml --with-kubernetes v1.26.5 --skip-dependency-check