chore(deps): update container image ghcr.io/k8s-at-home/kubectl to v1.23.6 (#291)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

cluster/apps/networking/cloudflare-ddns/cron-job.yaml

@@ -18,7 +18,7 @@ spec:
           restartPolicy: Never
           containers:
             - name: cloudflare-ddns
-              image: ghcr.io/k8s-at-home/kubectl:v1.23.5
+              image: ghcr.io/k8s-at-home/kubectl:v1.23.6
               envFrom:
                 - secretRef:
                     name: cloudflare-ddns