Upgrading kubernetes API

Change-Id: I279db986e2dab1ebcb5b48b4195363af395c8de3
diff --git a/voltha/templates/60-cluster-ingress-nginx.yaml b/voltha/templates/60-cluster-ingress-nginx.yaml
index 98517ee..7e938cb 100644
--- a/voltha/templates/60-cluster-ingress-nginx.yaml
+++ b/voltha/templates/60-cluster-ingress-nginx.yaml
@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: nginx-ingress-controller