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

…d-nsc-vpp@main

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

Commit: 4371e4d
Author: Vladimir Popov
Date: 2021-10-14 16:23:46 +0700
Message:
  - Manually update to networkservicemesh/sdk#1083 (#267)
Signed-off-by: NSMBot <nsmbot@networkservicmesh.io>

apps/nsc-memif/nsc.yaml

@@ -17,7 +17,7 @@ spec:
     spec:
       containers:
         - name: nsc
-          image: ghcr.io/networkservicemesh/ci/cmd-nsc-vpp:d2f4bca
+          image: ghcr.io/networkservicemesh/ci/cmd-nsc-vpp:4371e4d
           imagePullPolicy: IfNotPresent
           env:
             - name: NSM_REQUEST_TIMEOUT