[chore] update kubernetes manifest (open-telemetry#848)

* update k8s manifest to latest

Signed-off-by: Pierre Tessier <pierre@pierretessier.com>

* update k8s manifest to latest

Signed-off-by: Pierre Tessier <pierre@pierretessier.com>

* add copyright to generated k8s manifests

Signed-off-by: Pierre Tessier <pierre@pierretessier.com>

---------

Signed-off-by: Pierre Tessier <pierre@pierretessier.com>

Author: mohamed3637

CHANGELOG.md

@@ -7,6 +7,9 @@ release.
 
 ## Unreleased
 
+* [chore] use `otel-demo` namespace for generated kubernetes manifests
+  ([#848](https://github.com/open-telemetry/opentelemetry-demo/pull/848))
+
 ## 1.4.0
 
 * [cart] use 60m TTL for cart entries in redis

Makefile

@@ -103,4 +103,6 @@ generate-protobuf:
 generate-kubernetes-manifests:
 	helm repo add open-telemetry https://open-telemetry.github.io/opentelemetry-helm-charts
 	helm repo update
-	helm template opentelemetry-demo open-telemetry/opentelemetry-demo | sed '/helm.sh\/chart\:/d' | sed '/helm.sh\/hook/d' | sed '/managed-by\: Helm/d' > kubernetes/opentelemetry-demo.yaml
+	echo "# Copyright The OpenTelemetry Authors" > kubernetes/opentelemetry-demo.yaml
+	echo "# SPDX-License-Identifier: Apache-2.0" >> kubernetes/opentelemetry-demo.yaml
+	helm template opentelemetry-demo open-telemetry/opentelemetry-demo --namespace otel-demo | sed '/helm.sh\/chart\:/d' | sed '/helm.sh\/hook/d' | sed '/managed-by\: Helm/d' >> kubernetes/opentelemetry-demo.yaml