Update application version to latest version from networkservicemesh/…

…cmd-nsc-vpp@master networkservicemesh/cmd-nsc-vpp#

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

networkservicemesh/cmd-nsc-vpp commit message:
commit 56566ef42b4fdc2390b7ad0c05be5cd404846068
Author: Denis Tingaikin <49399980+denis-tingaikin@users.noreply.github.com>
Date:   Wed Feb 24 23:16:07 2021 +0700

    update to latest sdk (#14)

    Signed-off-by: Denis Tingaikin <denis.tingajkin@xored.com>

Signed-off-by: NSMBot <nsmbot@networkservicmesh.io>

apps/nsc-memif/nsc.yaml

@@ -16,7 +16,7 @@ spec:
     spec:
       containers:
         - name: nsc
-          image: networkservicemeshci/cmd-nsc-vpp:60efafce
+          image: networkservicemeshci/cmd-nsc-vpp:56566ef4
           imagePullPolicy: IfNotPresent
           env:
             - name: NSM_REQUEST_TIMEOUT