Update for flux API changes

Signed-off-by: David Young <davidy@funkypenguin.co.nz>

docs/kubernetes/ssl-certificates/secret-replicator.md

@@ -44,7 +44,7 @@ spec:
 Now that the "global" elements of this deployment have been defined, we do some "flux-ception", and go one layer deeper, adding another Kustomization, telling flux to deploy any YAMLs found in the repo at `/secret-replicator`. I create this example Kustomization in my flux repo:
 
 ```yaml title="/bootstrap/kustomizations/kustomization-secret-replicator.yaml"
-apiVersion: kustomize.toolkit.fluxcd.io/v1beta1
+apiVersion: kustomize.toolkit.fluxcd.io/v1
 kind: Kustomization
 metadata:
   name: secret-replicator
@@ -57,7 +57,6 @@ spec:
   sourceRef:
     kind: GitRepository
     name: flux-system
-  validation: server
   healthChecks:
     - apiVersion: apps/v1
       kind: Deployment