Update voltha chart to 2.3.1
diff --git a/releases/voltha-2.3 b/releases/voltha-2.3
index f16fc9c..7ef2385 100644
--- a/releases/voltha-2.3
+++ b/releases/voltha-2.3
@@ -1,6 +1,6 @@
 # Source this file before running ./voltha up to install the VOLTHA 2.3.0 release
 
-export VOLTHA_CHART_VERSION=2.3.0
+export VOLTHA_CHART_VERSION=2.3.1
 export VOLTHA_BBSIM_CHART_VERSION=3.0.18
 export VOLTHA_ADAPTER_OPEN_OLT_CHART_VERSION=2.3.0
 export VOLTHA_ADAPTER_OPEN_ONU_CHART_VERSION=2.3.0