Update Ntfy.handlebars (#298)

Jellyfin.Plugin.Webhook/Templates/Ntfy.handlebars

@@ -7,6 +7,9 @@
 ##Correct: https://ntfy.sh[:PORT]
 ##Incorrect: https://ntfy.sh[:PORT]/jellyfin
 ##
+##For use with enabled Access Controll (Authentification)
+##Add Request Header acording to https://docs.ntfy.sh/publish/#authentication
+##
 ##The topic ("jellyfin"), priorities (1-5) and of course titles & messages are specified within this JSON template. Modify them as you wish.
 ##<----- REMOVE THESE LINES!!!
 {
@@ -107,4 +110,4 @@
         "priority": 5,
         "message": "---\n**- User:** {{{NotificationUsername}}}\n**- Device/Client:** {{{DeviceName}}} - {{{ClientName}}}\n**- IP Address:** {{{RemoteEndPoint}}}\n**- Issue:** User has been locked out!"
     {{/if_equals}}
-}
+}