[VOL-2486]  Changing voltha-go to v2.3.0-dev

Change-Id: I7502753613be83724d4684e341847bab2cd8617c
diff --git a/VERSION b/VERSION
index bdbe651..d64a644 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.2.4-dev
+2.3.0-dev