Update README.md

Signed-off-by: Zee Aslam <[email protected]>

cluster/apps/flux-system/notifications/grafana/README.md

@@ -3,3 +3,5 @@
 This is making use of the [flux-grafana-provider](https://fluxcd.io/docs/components/notification/provider/#grafana)
 
 I was working on a script to generate a token dynamically but ran out of time so I made one manually since I still have persistence enabled for grafana. I will not be able to make it ephemeral again until this is sorted.
+
+Since #4108 I am using keycloak for Grafana authentication. This is kaput until I adjust this workload to get credentials from keycloak and use that to authenticate with grafana. Should be much easier than dealing with grafana persistence. Can keep it ephemeral now