chore: Add still valid option to comment for trafficDistribution

* Requested by maintainer

Author: younsl

charts/docker-mailserver/values.yaml

@@ -301,8 +301,9 @@ service:
  ## unless you have a good reason not to.
  # externalTrafficPolicy: "Cluster"
  ## Traffic distribution preference for Services. One of:
- ## - PreferSameZone
- ## - PreferSameNode
+ ## - PreferClose
+ ## - PreferSameZone (started from 1.34)
+ ## - PreferSameNode (started from 1.34)
  ## Ref: https://kubernetes.io/docs/concepts/services-networking/service/#traffic-distribution
  trafficDistribution: ""
  ## If there is a port associated with a given service, expose it here.