[VOL-3365] Move default helm to 3.2.4

Change-Id: I9c3a096e43affd4d965de055618d0236a95ce4a2
diff --git a/releases/voltha-2.4 b/releases/voltha-2.4
index 00ce6d1..c37fc80 100644
--- a/releases/voltha-2.4
+++ b/releases/voltha-2.4
@@ -11,6 +11,7 @@
 export RADIUS_CHART_VERSION=1.0.1
 export VOLTCTL_VERSION=1.1.8
 export WITH_ONOS=classic
+export HELM_VERSION=v3.2.4
 
 # defaults.image_tag=null will use the image tags in the Helm charts rather than
 # kind-voltha's default which is 'master'.