Correctly parse updated_at timestamps from OpsGenie

when paginating alerts using cursor-based pagination.

The OpsGenie API will truncate the `updated_at` timestamp of alerts where the timestamp falls exactly on the second.

This change extends the list of accepted cursor-based timestamp formats to include a format without fractions of seconds to correctly handle the response in this circumstance.

See more details:
airbytehq#35020

airbyte-integrations/connectors/source-opsgenie/source_opsgenie/manifest.yaml

@@ -107,6 +107,7 @@ definitions:
       cursor_field: updatedAt
       cursor_datetime_formats:
         - "%Y-%m-%dT%H:%M:%S.%fZ"
+        - "%Y-%m-%dT%H:%M:%SZ"
       datetime_format: "%s"
       start_datetime:
         datetime: "{{ config['start_date'] }}"