(fleet/traefik) add smon scraping label

Author: jhoblitt

fleet/lib/traefik/values.yaml

@@ -19,9 +19,10 @@ metrics:
   prometheus:
     service:
       enabled: true
+      labels:
+        lsst.io/monitor: "true"
     disableAPICheck: false
     serviceMonitor:
-      enabled: true
 service:
   annotations:
     metallb.universe.tf/address-pool: ingress