[VOL-5056] - Pre-release triage build for voltha-protos

VERSION
-------
  o Bump verison file to a *-dev release.

Change-Id: I5f7bc90ba5e641df73553c758867ddddb86ed2b8
diff --git a/VERSION b/VERSION
index bb0915f..3191ed8 100755
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-5.4.6
+5.4.6.1-dev