[LPD] [Correct] Don't pass default snapshot_at=None to calibration_client

Description

This is the same change as in !782 (merged), but I missed doing it to the pre notebook in that MR.

Types of changes

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• My code follows the code style of this project.

Reviewers

@manettim @ahmedk @schmidtp

notebooks/LPD/LPD_retrieve_constants_precorrection.ipynb

         resp = CalibrationConstantVersion.get_closest_by_time_by_detector_conditions(
             client, karabo_id, list(calibrations.keys()),
             {'parameters_conditions_attributes': condition},
-            karabo_da=k_da, event_at=creation_time.isoformat(), snapshot_at=None)
+            karabo_da=k_da, event_at=creation_time.isoformat())
 
         if not resp["success"]:
             print(f"ERROR: Constants {list(calibrations.values())} "