Better documentation

Co-authored-by: Siegfried Weber <mail@siegfriedweber.net>

Author: Maleware

docs/modules/airflow/pages/usage-guide/logging.adoc

@@ -3,7 +3,10 @@
 
 The logs can be forwarded to a Vector log aggregator by providing a discovery ConfigMap for the aggregator and by enabling the log agent:
 
-NOTE: airflow.task log level is set to `INFO` by default.
+NOTE: The `task` handler is responsible for showing the task logs in the UI.
+Unfortunately, the log level of the `task` handler cannot be specified.
+To avoid that all logs are emitted to the UI, the log level of the `airflow.task` logger is set explicitly to `INFO`.
+You can change the log level as shown below.
 
 [source,yaml]
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