Update notify_DSM.sh

Added the passed array to a variable.
Created printable string with newlines.

notify_DSM.sh

@@ -1,7 +1,8 @@
 # copy/rename this file to notify.sh to enable email notifications on synology DSM
 
 send_notification() {
-
+Updates=("$@")
+UpdToString=$( printf "%s\n" "${Updates[@]}" )
 # change this to your usual destination for synology DSM notification emails
 SendMailTo=me@mydomain.com
 FromHost=$(hostname)
@@ -18,8 +19,9 @@ Content-Transfer-Encoding: 7bit
 
 The following docker packages on $FromHost need to be updated:
 
-$@
+"$UpdToString"
 
 From $FromHost
+
 __EOF
 }