feat: use the staging lets encrypt certificate by default to prevent being rate limited

Signed-off-by: Devin Buhl <devin@buhl.casa>

kubernetes/apps/system-upgrade/kustomization.yaml

@@ -3,4 +3,7 @@ apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 resources:
   - ./namespace.yaml
+  # NOTE: Only enable system-upgrade-controller if you also update the version of k3s in the following file
+  # otherwise if you run ansible against an already provisioned cluster you might downgrade it
+  # https://github.com/onedr0p/flux-cluster-template/blob/main/ansible/inventory/group_vars/kubernetes/k3s.yml
   # - ./system-upgrade-controller/ks.yaml