Using openonu-adapter chart 2.6.9 in voltha-2.6

Change-Id: Ib16dd09796acc52948aa34e9c288ebcf6c238332
diff --git a/releases/voltha-2.6 b/releases/voltha-2.6
index 3ab057c..e407a6b 100644
--- a/releases/voltha-2.6
+++ b/releases/voltha-2.6
@@ -6,7 +6,7 @@
 export VOLTHA_CHART_VERSION=2.7.2
 export VOLTHA_BBSIM_CHART_VERSION=4.1.5
 export VOLTHA_ADAPTER_OPEN_OLT_CHART_VERSION=2.7.1
-export VOLTHA_ADAPTER_OPEN_ONU_CHART_VERSION=2.6.8
+export VOLTHA_ADAPTER_OPEN_ONU_CHART_VERSION=2.6.9
 export ONOS_CLASSIC_CHART_VERSION=0.1.11
 export RADIUS_CHART_VERSION=1.0.2
 export VOLTCTL_VERSION=1.3.1