Update go.mod and go.sum to latest version from networkservicemesh/cm…

…d-forwarder-vpp@main

PR link: https://github.com/networkservicemesh/cmd-forwarder-vpp/pull/

Commit: 3886fd8
Author: Artem Glazychev
Date: 2021-09-24 16:40:16 +0700
Message:
  - Manually update sdk-* to the latest version (#347)
Signed-off-by: NSMBot <nsmbot@networkservicmesh.io>

apps/forwarder-vpp/forwarder.yaml

@@ -16,7 +16,7 @@ spec:
     spec:
       hostNetwork: true
       containers:
-        - image: ghcr.io/networkservicemesh/ci/cmd-forwarder-vpp:81a8f6a
+        - image: ghcr.io/networkservicemesh/ci/cmd-forwarder-vpp:3886fd8
           imagePullPolicy: IfNotPresent
           name: forwarder-vpp
           securityContext: