Update application version to latest version from networkservicemesh/…

…cmd-nse-icmp-responder@main networkservicemesh/cmd-nse-icmp-responder#

networkservicemesh/cmd-nse-icmp-responder PR link: https://github.com/networkservicemesh/cmd-nse-icmp-responder/pull/

networkservicemesh/cmd-nse-icmp-responder commit message:
commit 57c0ee22490dff572912c7fa6fc15dffdd5a7e6f
Author: Ed Warnicke <hagbard@gmail.com>
Date:   Sat Apr 17 16:12:42 2021 -0500

    Merge pull request #145 from networkservicemesh/update/networkservicemesh/cmd-template

    Update from update/networkservicemesh/cmd-template

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

apps/nse-kernel/nse.yaml

@@ -16,7 +16,7 @@ spec:
     spec:
       containers:
         - name: nse
-          image: networkservicemeshci/cmd-nse-icmp-responder:a68d853a
+          image: networkservicemeshci/cmd-nse-icmp-responder:57c0ee22
           imagePullPolicy: IfNotPresent
           env:
             - name: SPIFFE_ENDPOINT_SOCKET