⏫ Bump up kubeadm configuration version

v1beta2 support was removed in Kubernetes 1.27.
Warning, v1beta3 was introduced in Kubernetes 1.22
(I think?) which means that the minimum version for
"old cluster" deployments is now 1.22.

prepare-labs/lib/commands.sh

@@ -498,7 +498,7 @@ EOF"
         kubeadm token generate > /tmp/token &&
         cat >/tmp/kubeadm-config.yaml <<EOF
 kind: InitConfiguration
-apiVersion: kubeadm.k8s.io/v1beta2
+apiVersion: kubeadm.k8s.io/v1beta3
 bootstrapTokens:
 - token: \$(cat /tmp/token)
 nodeRegistration:
@@ -506,7 +506,7 @@ nodeRegistration:
   - NumCPU
 ---
 kind: JoinConfiguration
-apiVersion: kubeadm.k8s.io/v1beta2
+apiVersion: kubeadm.k8s.io/v1beta3
 discovery:
   bootstrapToken:
     apiServerEndpoint: \$(cat /etc/name_of_first_node):6443
@@ -521,7 +521,7 @@ apiVersion: kubelet.config.k8s.io/v1beta1
 failSwapOn: false
 ---
 kind: ClusterConfiguration
-apiVersion: kubeadm.k8s.io/v1beta2
+apiVersion: kubeadm.k8s.io/v1beta3
 apiServer:
   certSANs:
   - \$(cat /tmp/ipv4)