update chart version 0.9.0

Author: Ali Chaddad

grid-proxy/charts/gridproxy/Chart.yaml

@@ -20,4 +20,4 @@ version: 1.0.0
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application. Versions are not expected to
 # follow Semantic Versioning. They should reflect the version the application is using.
-appVersion: 0.8.3
+appVersion: 0.9.0