go.mod updated with latest voltha-protos version before release 2.12

Change-Id: I3b52959460e029fa6db613e836e8dec3d57e1960
diff --git a/go.mod b/go.mod
index 60389b3..bdd1537 100644
--- a/go.mod
+++ b/go.mod
@@ -34,7 +34,7 @@
 	github.com/jhump/protoreflect v1.10.2
 	github.com/jonboulle/clockwork v0.2.2 // indirect
 	github.com/onsi/gomega v1.14.0 // indirect
-	github.com/opencord/voltha-protos/v5 v5.3.8
+	github.com/opencord/voltha-protos/v5 v5.4.6
 	github.com/opentracing/opentracing-go v1.2.0
 	github.com/phayes/freeport v0.0.0-20180830031419-95f893ade6f2
 	github.com/prometheus/client_golang v1.11.0