Update application version to latest version from networkservicemesh/…

…cmd-registry-k8s@master networkservicemesh/cmd-registry-k8s#

networkservicemesh/cmd-registry-k8s PR link: https://github.com/networkservicemesh/cmd-registry-k8s/pull/

networkservicemesh/cmd-registry-k8s commit message:
commit b2c4136de3c879d87ca8b4a3453f4ea12bed1737
Author: Network Service Mesh Bot <60070799+nsmbot@users.noreply.github.com>
Date:   Tue Apr 13 11:47:16 2021 -0500

    Sync files with networkservicemesh/cmd-template

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

apps/registry-k8s/registry-k8s.yaml

@@ -16,7 +16,7 @@ spec:
     spec:
       serviceAccountName: registry-k8s-sa
       containers:
-        - image: networkservicemeshci/cmd-registry-k8s:23436058
+        - image: networkservicemeshci/cmd-registry-k8s:b2c4136d
           env:
             - name: SPIFFE_ENDPOINT_SOCKET
               value: unix:///run/spire/sockets/agent.sock