Update nm-upgrade.sh with correct nmctl download path

scripts/nm-upgrade.sh

@@ -510,7 +510,7 @@ setup_netclient() {
 # setup_nmctl - pulls nmctl and makes it executable
 setup_nmctl() {
 
-    wget -O nmctl https://github.com/gravitl/netmaker/releases/download/$LATEST/nmctl_linux_amd64
+    wget -O nmctl https://github.com/gravitl/netmaker/releases/download/$LATEST/nmctl-linux-amd64
   
     chmod +x nmctl
     echo "using server $SERVER_HTTP_HOST"
@@ -719,4 +719,4 @@ echo "-----------------------------------------------------------------"
 echo "Netmaker setup is now complete. You are ready to begin using Netmaker."
 echo "Visit dashboard.$SERVER_NAME to log in"
 echo "-----------------------------------------------------------------"
-echo "-----------------------------------------------------------------"
+echo "-----------------------------------------------------------------"