Update application version to latest version from networkservicemesh/…

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

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

networkservicemesh/cmd-registry-memory commit message:
commit 906668f554327f556e19665b8d3c6ec0ff1e4702
Author: Network Service Mesh Bot <60070799+nsmbot@users.noreply.github.com>
Date:   Tue Apr 13 11:48:08 2021 -0500

    Sync files with networkservicemesh/cmd-template

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

apps/registry-memory/registry-memory.yaml

@@ -15,7 +15,7 @@ spec:
         app: nsm-registry
     spec:
       containers:
-        - image: networkservicemeshci/cmd-registry-memory:86c8e071
+        - image: networkservicemeshci/cmd-registry-memory:906668f5
           env:
             - name: SPIFFE_ENDPOINT_SOCKET
               value: unix:///run/spire/sockets/agent.sock