fix trailing whitespace

docker-compose/traefik/config/example.externalservice.yaml

@@ -11,7 +11,7 @@
 #         - websecure
 #       tls:
 #         certResolver: cloudflare
-# 
+#
 #   # -- Change Service Configuration here...
 #   services:
 #     your-local-service:  # <-- Change Service Name here...