go.mod updated with latest voltha-lib-go and voltha-protos versions before release 2.12

Change-Id: I40203a9b8b9cf96f8abe2bd0af27de0d4d527065
diff --git a/go.mod b/go.mod
index b2a08f7..b495c5c 100644
--- a/go.mod
+++ b/go.mod
@@ -16,8 +16,8 @@
 	github.com/google/gopacket v1.1.17
 	github.com/looplab/fsm v0.2.0
 	github.com/opencord/omci-lib-go/v2 v2.2.3
-	github.com/opencord/voltha-lib-go/v7 v7.3.2
-	github.com/opencord/voltha-protos/v5 v5.4.1
+	github.com/opencord/voltha-lib-go/v7 v7.4.2
+	github.com/opencord/voltha-protos/v5 v5.4.6
 	github.com/stretchr/testify v1.7.0
 	google.golang.org/grpc v1.44.0
 )