Bump chart version

Use 6.0.0 in preparation for Frankfurt release

Issue-ID: OOM-2320
Signed-off-by: Sylvain Desbureaux <sylvain.desbureaux@orange.com>
Change-Id: I8ad82dfdf48b56c38c0e85d640b18cc13c8d9e67
diff --git a/docs/release-notes.rst b/docs/release-notes.rst
index fd90a37..154c6ab 100644
--- a/docs/release-notes.rst
+++ b/docs/release-notes.rst
@@ -61,6 +61,21 @@
 
   - `Passing Badge information for OOM <https://bestpractices.coreinfrastructure.org/en/projects/1631>`_
 
+Version 6.0.0 (Frankfurt)
+----------------------------------
+
+:Release Date: 2020-05-14
+
+Summary
+-------
+
+**Software Requirements**
+
+* Upgraded to Kubernetes 1.15.x and Helm 2.16.x
+
+**Hardcoded Password removal**
+
+* All mariadb galera password are not hardcoded
 
 
 Version 5.0.0 (El Alto Early Drop)