[DDF] Please add doc for the retryTimeOut parameter also which is missing in this table

Please add doc for the retryTimeOut parameter also which is missing in this table.

• retryTimeOut represents the maximum time interval to attempt retries before giving up and the record is discarded.
  https://github.com/openshift/cluster-logging-operator/blob/master/apis/logging/v1/clusterlogging_types.go#L384-L388
• Retries Parameters
  https://docs.fluentd.org/configuration/buffer-section#retries-parameters
  Reported by: rhn-support-rludva
  https://access.redhat.com/documentation/en-us/openshift_container_platform/4.9/html/logging/configuring-your-logging-deployment#annotations:98446f93-60a6-40a0-a27c-baf45701efc2