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

Change-Id: I3b52959460e029fa6db613e836e8dec3d57e1960
diff --git a/vendor/modules.txt b/vendor/modules.txt
index c2a2aa3..09a48be 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -245,7 +245,7 @@
 github.com/modern-go/reflect2
 # github.com/onsi/gomega v1.14.0
 ## explicit
-# github.com/opencord/voltha-protos/v5 v5.3.8
+# github.com/opencord/voltha-protos/v5 v5.4.6
 ## explicit
 github.com/opencord/voltha-protos/v5/go/adapter_service
 github.com/opencord/voltha-protos/v5/go/common
@@ -261,6 +261,8 @@
 github.com/opencord/voltha-protos/v5/go/openflow_13
 github.com/opencord/voltha-protos/v5/go/openolt
 github.com/opencord/voltha-protos/v5/go/tech_profile
+github.com/opencord/voltha-protos/v5/go/voip_system_profile
+github.com/opencord/voltha-protos/v5/go/voip_user_profile
 github.com/opencord/voltha-protos/v5/go/voltha
 # github.com/opentracing/opentracing-go v1.2.0
 ## explicit