Use new cert-manager annotations

Author: vdboor

deployment/kustomize/environments/prd/ingress.yml

@@ -3,8 +3,7 @@ kind: Ingress
 metadata:
   name: djangofluent
   annotations:
-    certmanager.k8s.io/acme-challenge-type: http01
-    certmanager.k8s.io/cluster-issuer: letsencrypt-prod
+    certmanager.io/cluster-issuer: letsencrypt-prod
     kubernetes.io/ingress.class: nginx
     ingress.kubernetes.io/force-ssl-redirect: "true"
     ingress.kubernetes.io/proxy-body-size: 10m