[COMMON] Bump ONAP version

Use version 9.0.0 for Istanbul
Also update the doc.

Issue-ID: OOM-1
Signed-off-by: Sylvain Desbureaux <sylvain.desbureaux@orange.com>
Change-Id: I03e11799bf487226784c98b04116f005c89d1e70
diff --git a/kubernetes/policy/components/policy-gui/Chart.yaml b/kubernetes/policy/components/policy-gui/Chart.yaml
index 58ece99..a407ea9 100644
--- a/kubernetes/policy/components/policy-gui/Chart.yaml
+++ b/kubernetes/policy/components/policy-gui/Chart.yaml
@@ -1,5 +1,6 @@
 #  ============LICENSE_START=======================================================
 #   Copyright (C) 2021 Nordix Foundation.
+#   Modifications Copyright © 2021 Orange
 #  ================================================================================
 #  Licensed under the Apache License, Version 2.0 (the "License");
 #  you may not use this file except in compliance with the License.
@@ -19,4 +20,4 @@
 apiVersion: v1
 description: ONAP Policy GUI
 name: policy-gui
-version: 8.0.0
+version: 9.0.0