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

Change-Id: Icba223a8a3a579b46f78480b25c2bb4bc7c483d7
diff --git a/go.mod b/go.mod
index 9bdb730..407b5fc 100644
--- a/go.mod
+++ b/go.mod
@@ -14,7 +14,7 @@
 	github.com/golang/protobuf v1.5.2
 	github.com/grpc-ecosystem/go-grpc-middleware v1.3.0
 	github.com/opencord/voltha-lib-go/v7 v7.4.2
-	github.com/opencord/voltha-protos/v5 v5.3.8
+	github.com/opencord/voltha-protos/v5 v5.4.6
 	github.com/stretchr/testify v1.7.0
 	go.etcd.io/etcd v3.3.25+incompatible
 	google.golang.org/grpc v1.44.0