moving inside overview so it shows up in the integration tile (DataDog#23419)

Author: aboitreaud

airflow/README.md

@@ -1,12 +1,12 @@
 # Agent Check: Airflow
 
+## Overview
+
 <div class="alert alert-info">
 <a href="https://docs.datadoghq.com/data_observability/jobs_monitoring/">Data Observability: Jobs Monitoring</a> provides out-of-the-box tracing for Airflow DAG runs, helping you quickly troubleshoot problematic tasks, correlate DAG runs to logs, and understand complex pipelines with data lineage across DAGs.<br/><br/>
 <strong>Note</strong>: This page covers only the documentation for collecting Airflow integration metrics and logs using the Datadog Agent.
 </div>
 
-## Overview
-
 The Datadog Agent collects many metrics from Airflow, including those for:
 
 - DAGs (Directed Acyclic Graphs): Number of DAG processes, DAG bag size, etc.