Update application version to latest version from networkservicemesh/…

…cmd-nse-icmp-responder@master networkservicemesh/cmd-nse-icmp-responder#125

networkservicemesh/cmd-nse-icmp-responder PR link: networkservicemesh/cmd-nse-icmp-responder#125

networkservicemesh/cmd-nse-icmp-responder commit message:
commit a8e08f21e56df1902bf8e867c44007e329b5d75b
Author: Network Service Mesh Bot <60070799+nsmbot@users.noreply.github.com>
Date:   Wed Mar 31 09:45:28 2021 -0500

    Merge 28d34a63512894c6a9733462f65c0a50b8b90672 into 8cfc8ee5ec2af90b1a2f4414721c9b8e75775f5f

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:083b36e3
+          image: networkservicemeshci/cmd-nse-icmp-responder:a8e08f21
           imagePullPolicy: IfNotPresent
           env:
             - name: SPIFFE_ENDPOINT_SOCKET