Updating to latest ingress API

Signed-off-by: Matt Farina <matt@mattfarina.com>

pkg/chartutil/create.go

@@ -140,7 +140,7 @@ const defaultIgnore = `# Patterns to ignore when building packages.
 const defaultIngress = `{{- if .Values.ingress.enabled -}}
 {{- $fullName := include "<CHARTNAME>.fullname" . -}}
 {{- $svcPort := .Values.service.port -}}
-apiVersion: extensions/v1beta1
+apiVersion: networking.k8s.io/v1beta1
 kind: Ingress
 metadata:
   name: {{ $fullName }}