fix cluster config

e2e/kind.cluster.yml

@@ -1,20 +1,17 @@
-# based on https://github.com/kind-ci/examples/blob/master/.gitlab-ci.yml
+# based on https://github.com/kind-ci/examples
 apiVersion: kind.x-k8s.io/v1alpha4
 kind: Cluster
 name: chart-testing
 networking:
   apiServerAddress: '0.0.0.0'
 
-# add to the apiServer certSANs the name of the docker (dind) service in order to be able to reach the cluster through it
-kubeadmConfigPatchesJSON6902:
-  - group: kubeadm.k8s.io
-    version: v1beta2
-    kind: ClusterConfiguration
-    patch: |
-      - op: add
-        path: /apiServer/certSANs/-
-        value: docker
-
 nodes:
+  # add to the apiServer certSANs the name of the drone service in order to be able to reach the cluster through it
   - role: control-plane
+    kubeadmConfigPatches:
+      - |
+        kind: ClusterConfiguration
+        apiServer:
+          certSANs:
+          - docker
   - role: worker