Update application version to latest version from networkservicemesh/…

…cmd-forwarder-vpp@main networkservicemesh/cmd-forwarder-vpp#

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

networkservicemesh/cmd-forwarder-vpp commit message:
commit 31a52b18bf0911adc18b7ec418ef45da66571383
Author: Network Service Mesh Bot <60070799+nsmbot@users.noreply.github.com>
Date:   Wed Jul 21 08:08:10 2021 -0500

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

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:73df109
+        - image: ghcr.io/networkservicemesh/ci/cmd-forwarder-vpp:31a52b1
           imagePullPolicy: IfNotPresent
           name: forwarder-vpp
           securityContext: