Fix tooltip typo (#11593)

airflow/www/templates/airflow/dags.html

@@ -172,7 +172,7 @@
                   <a href="{{ url_for('Airflow.gantt', dag_id=dag.dag_id) }}" class="js-tooltip" title="Gantt View" aria-label="Gantt">
                     <span class="material-icons" aria-hidden="true" data-original-title="Gantt">vertical_distribute</span>
                   </a>
-                  <a href="{{ url_for('Airflow.dag_details', dag_id=dag.dag_id) }}" class="js-tooltip" title="DAG Dtails" aria-label="DAG Details">
+                  <a href="{{ url_for('Airflow.dag_details', dag_id=dag.dag_id) }}" class="js-tooltip" title="DAG Details" aria-label="DAG Details">
                     <span class="material-icons" aria-hidden="true">details</span>
                   </a>
                   <a href="{{ url_for('Airflow.code', dag_id=dag.dag_id) }}" class="js-tooltip" title="Code View" aria-label="Code">