Use openonu-py adapter chart version 2.4.5 for voltha-2.4 release

Change-Id: I866cd8656e94d9119bb248aeef1b3766da767bc1
diff --git a/releases/voltha-2.4 b/releases/voltha-2.4
index 44771e4..825fc56 100644
--- a/releases/voltha-2.4
+++ b/releases/voltha-2.4
@@ -6,7 +6,7 @@
 export VOLTHA_CHART_VERSION=2.5.4
 export VOLTHA_BBSIM_CHART_VERSION=3.0.29
 export VOLTHA_ADAPTER_OPEN_OLT_CHART_VERSION=2.5.5
-export VOLTHA_ADAPTER_OPEN_ONU_CHART_VERSION=2.4.4
+export VOLTHA_ADAPTER_OPEN_ONU_CHART_VERSION=2.4.5
 export ONOS_CLASSIC_CHART_VERSION=0.1.1
 export RADIUS_CHART_VERSION=1.0.0
 export VOLTCTL_VERSION=1.1.8