Update application version to latest version from networkservicemesh/…

…cmd-nsmgr@main networkservicemesh/cmd-nsmgr#

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

networkservicemesh/cmd-nsmgr commit message:
commit ad5956b4aa3139017874805c3e381cdc985dfe1a
Author: Network Service Mesh Bot <60070799+nsmbot@users.noreply.github.com>
Date:   Tue May 4 23:56:33 2021 -0500

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

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

apps/nsmgr/nsmgr.yaml

@@ -15,7 +15,7 @@ spec:
         app: nsmgr
     spec:
       containers:
-        - image: networkservicemeshci/cmd-nsmgr:8b3b5f07
+        - image: networkservicemeshci/cmd-nsmgr:ad5956b4
           imagePullPolicy: IfNotPresent
           name: nsmgr
           ports: