updated whatsapp config

roles/matrix-bridge-mautrix-whatsapp/templates/config.yaml.j2

@@ -33,7 +33,7 @@ appservice:
         max_idle_conns: 2
 
     # The unique ID of this appservice.
-    id: whatsappbot
+    id: whatsapp
     # Appservice bot details.
     bot:
         # Username of the appservice bot.