fix(k8s): update cluster-issuer annotation to new name

Author: themightychris

helm-chart/values.yaml

@@ -26,7 +26,7 @@ ingress:
   enabled: true
   annotations: 
     kubernetes.io/ingress.class: nginx
-    certmanager.k8s.io/cluster-issuer: letsencrypt-prod
+    cert-manager.io/cluster-issuer: letsencrypt-prod
     nginx.ingress.kubernetes.io/proxy-body-size: "0"
     nginx.ingress.kubernetes.io/configuration-snippet: |
       # Inject Google Tag Manager: