Fix deprecated

[zoic21]

Fix warning at startup :

STATE_DOCKED was used from mydolphin_plus, this is a deprecated constant which will be removed in HA Core 2026.1. Use VacuumActivity.DOCKED instead, please report it to the author of the 'mydolphin_plus' custom integration
STATE_CLEANING was used from mydolphin_plus, this is a deprecated constant which will be removed in HA Core 2026.1. Use VacuumActivity.CLEANING instead, please report it to the author of the 'mydolphin_plus' custom integration
STATE_ERROR was used from mydolphin_plus, this is a deprecated constant which will be removed in HA Core 2026.1. Use VacuumActivity.ERROR instead, please report it to the author of the 'mydolphin_plus' custom integration
STATE_RETURNING was used from mydolphin_plus, this is a deprecated constant which will be removed in HA Core 2026.1. Use VacuumActivity.RETURNING instead, please report it to the author of the 'mydolphin_plus' custom integration