Fix templates for missing apiVersion

Also make default values more genral

Change-Id: I14ae9fc5a64bb725ebdf2d110137c44cde1fff91
diff --git a/apps/person-detection-app/templates/serviceaccount.yaml b/apps/person-detection-app/templates/serviceaccount.yaml
index 795b694..9e6428d 100644
--- a/apps/person-detection-app/templates/serviceaccount.yaml
+++ b/apps/person-detection-app/templates/serviceaccount.yaml
@@ -1,5 +1,8 @@
-# Copyright 2020-present Open Networking Foundation
-# SPDX-License-Identifier: LicenseRef-ONF-Member-Only-1.0
+{{/*
+# Copyright 2022-present Open Networking Foundation
+
+# SPDX-License-Identifier: Apache-2.0
+*/}}
 
 {{- if .Values.serviceAccount.create -}}
 apiVersion: v1