Update application version to latest version from networkservicemesh/…

…cmd-registry-k8s@main 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 6bebd6a839ff8cf8fc7d5c2a090e9a9b3296ac1d
Author: Network Service Mesh Bot <60070799+nsmbot@users.noreply.github.com>
Date:   Mon Apr 19 04:32:20 2021 -0500

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

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:f76f5e2d
+        - image: networkservicemeshci/cmd-registry-k8s:6bebd6a8
           env:
             - name: SPIFFE_ENDPOINT_SOCKET
               value: unix:///run/spire/sockets/agent.sock