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

…d-nsmgr@main

PR link: networkservicemesh/cmd-nsmgr#531

Commit: 12b5d48
Author: Network Service Mesh Bot
Date: 2022-09-08 05:07:10 -0500
Message:
  - Update go.mod and go.sum to latest version from networkservicemesh/sd…
Signed-off-by: NSMBot <nsmbot@networkservicmesh.io>

apps/nsmgr/nsmgr.yaml

@@ -17,7 +17,7 @@ spec:
     spec:
       serviceAccount: nsmgr-sa
       containers:
-        - image: ghcr.io/networkservicemesh/ci/cmd-nsmgr:670a45e
+        - image: ghcr.io/networkservicemesh/ci/cmd-nsmgr:12b5d48
           imagePullPolicy: IfNotPresent
           name: nsmgr
           ports: