Fix incorrect type annotation

Co-authored-by: Jessica Scheick <[email protected]>

icepyx/core/temporal.py

@@ -270,7 +270,7 @@ def validate_date_range_date(
 
 
 def validate_date_range_dict(
-    date_range: dict[str, Union[str, dt.datetime]],
+    date_range: dict[str, Union[str, dt.date]],
     start_time: Union[str, dt.time, None] = None,
     end_time: Union[str, dt.time, None] = None,
 ) -> tuple[dt.datetime, dt.datetime]: