Helm - add license annotations, add type keyword, remove gotpl

Signed-off-by: junya koyama <arukiidou@yahoo.co.jp>

charts/ingress-nginx/Chart.yaml

@@ -5,12 +5,12 @@ annotations:
      - "[helm] configure allow to configure hostAliases (#10180)"
      - "[helm] pass service annotations through helm tpl engine (#10084)"
      - "Update Ingress-Nginx version controller-v1.9.0-beta.0"
+  artifacthub.io/license: Apache-2.0
   artifacthub.io/prerelease: "true"
 apiVersion: v2
 appVersion: 1.9.0-beta.0
 description: Ingress controller for Kubernetes using NGINX as a reverse proxy and
   load balancer
-engine: gotpl
 home: https://github.com/kubernetes/ingress-nginx
 icon: https://upload.wikimedia.org/wikipedia/commons/thumb/c/c5/Nginx_logo.svg/500px-Nginx_logo.svg.png
 keywords:
@@ -24,4 +24,5 @@ maintainers:
 name: ingress-nginx
 sources:
 - https://github.com/kubernetes/ingress-nginx
+type: application
 version: 4.8.0-beta.0