added arm64 binary of k3s

iot-device needs arm64 k3s binary so added that also in release.

Signed-off-by: Abdhesh Nayak <abdheshnayak@gmail.com>

Author: abdheshnayak

.github/workflows/release-k3s-runner.yml

@@ -73,6 +73,7 @@ jobs:
           GOARCH=amd64 task build
           GOARCH=arm64 task build
           curl -L0 "https://github.com/k3s-io/k3s/releases/download/$K3S_VERSION/k3s" > bin/k3s
+          curl -L0 "https://github.com/k3s-io/k3s/releases/download/$K3S_VERSION/k3s-arm64" > bin/k3s-arm64
 
           PRE_RELEASE=$OVERRIDE_RELEASE