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

…d-nsmgr@main

PR link: networkservicemesh/cmd-nsmgr#677

Commit: 515e54b
Author: Arpad Kiss
Date: 2024-05-14 12:26:39 +0200
Message:
  - Align env vars (#677)
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:ddef9a3
+        - image: ghcr.io/networkservicemesh/ci/cmd-nsmgr:515e54b
           imagePullPolicy: IfNotPresent
           name: nsmgr
           ports: