Merge pull request #8066 from openshift-cherrypick-robot/cherry-pick-8049-to-enterprise-3.9

[enterprise-3.9] Removed reference to only journald

Author: mburke5678

install_config/aggregate_logging.adoc

@@ -965,7 +965,7 @@ still expects to read logs generated using the `json-file` log driver. This
 results in a lack of log ingestion. If this has happened within your logging cluster,
 xref:fluentd-upgrade-source[troubleshoot] it.
 
-Aggregated logging is only supported using the `journald` driver in Docker. See
+See
 xref:fluentd-upgrade-source[Updating Fluentd's Log Source After a Docker Log
 Driver Update] for more information.
 ====