missing docs for missed_runs

Author: Marenz

src/frequenz/dispatch/_dispatch.py

@@ -60,6 +60,9 @@ def missed_runs(self, since: datetime) -> Iterator[datetime]:  # noqa: DOC405
 
         Returns:
             A generator that yields all missed runs of a dispatch.
+
+        Yields:
+            datetime: The missed run.
         """
         now = datetime.now(tz=timezone.utc)