fix: cert-manager v1 kustomize build

Signed-off-by: Matthias Riegler <[email protected]>

Author: xvzf

config/default/kustomization.yaml

@@ -47,16 +47,16 @@ vars:
 - name: CERTIFICATE_NAMESPACE # namespace of the certificate CR
   objref:
     kind: Certificate
-    group: certmanager.k8s.io
-    version: v1alpha1
+    group: cert-manager.io
+    version: v1
     name: serving-cert # this name should match the one in certificate.yaml
   fieldref:
     fieldpath: metadata.namespace
 - name: CERTIFICATE_NAME
   objref:
     kind: Certificate
-    group: certmanager.k8s.io
-    version: v1alpha1
+    group: cert-manager.io
+    version: v1
     name: serving-cert # this name should match the one in certificate.yaml
 - name: SERVICE_NAMESPACE # namespace of the service
   objref: