Set required attribute when using Todoist Sync API reminder_add command (#122644)

* Set type=absolute when using Todoist Sync API reminder_add command.

This argument is required:

ref.: https://developer.todoist.com/sync/v8/#add-a-reminder

* Fix

---------

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

homeassistant/components/todoist/calendar.py

@@ -331,7 +331,11 @@ def async_register_services(  # noqa: C901
                         "type": "reminder_add",
                         "temp_id": str(uuid.uuid1()),
                         "uuid": str(uuid.uuid1()),
-                        "args": {"item_id": api_task.id, "due": reminder_due},
+                        "args": {
+                            "item_id": api_task.id,
+                            "type": "absolute",
+                            "due": reminder_due,
+                        },
                     }
                 ]
             }