Add copyright comment in index.yaml

charts/index.yaml

@@ -1,3 +1,22 @@
+#
+# If not stated otherwise in this file or this component's LICENSE file the
+# following copyright and licenses apply:
+#
+# Copyright 2023 Liberty Global Technology Services BV
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 apiVersion: v1
 entries:
   appstore-caching-service: