Update DagSkippedIntervalsCallbackRequest docstring, replace .in_() with ==

Author: Tegh25

airflow-core/src/airflow/callbacks/callback_requests.py

@@ -176,7 +176,7 @@ class DagCallbackRequest(BaseCallbackRequest):
 
 
 class DagSkippedIntervalsCallbackRequest(BaseCallbackRequest):
-    """A Class with information about the skipped intervals DAG callback to be executed."""
+    """Store skipped intervals callback data for execution by the Dag processor."""
 
     dag_id: str
     skipped_interval_count: int

airflow-core/src/airflow/jobs/scheduler_job_runner.py

@@ -2416,7 +2416,7 @@ def _collect_skipped_intervals(
             select(DagRun)
             .where(
                 DagRun.dag_id == serdag.dag_id,
-                DagRun.run_type.in_([DagRunType.SCHEDULED]),
+                DagRun.run_type == DagRunType.SCHEDULED,
                 DagRun.data_interval_end.is_not(None),
                 DagRun.data_interval_end <= new_data_interval.start,
             )