added arm64 in common_auth.sh (#191)

diff --git a/scripts/pulsar/common_auth.sh b/scripts/pulsar/common_auth.sh
index b9d3aba..3f96e49 100755
--- a/scripts/pulsar/common_auth.sh
+++ b/scripts/pulsar/common_auth.sh
@@ -25,7 +25,7 @@
 
 OUTPUT=${CHART_HOME}/output
 OUTPUT_BIN=${OUTPUT}/bin
-PULSARCTL_VERSION=v0.4.0
+PULSARCTL_VERSION=v2.8.2.1
 PULSARCTL_BIN=${HOME}/.pulsarctl/pulsarctl
 export PATH=${HOME}/.pulsarctl/plugins:${PATH}
 
@@ -36,6 +36,7 @@
     x86_64) ARCH="amd64";;
     i686) ARCH="386";;
     i386) ARCH="386";;
+    arm64) ARCH="arm64";;
   esac
 }