VOL-3298: VOLTHA2.4 release for voltha-helm-chart

Change-Id: I26abf722ce79ce0de162ed45ea6aad4b3fdcb08c
diff --git a/VERSION b/VERSION
index 32d1656..197c4d5 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.3.1-dev
+2.4.0