translate chinese strings:

    # game/scripts/characters/tonks/requests.rpy:3
    old "Detention with Tonks."
    new "Detention with Tonks."

    # game/scripts/characters/tonks/requests.rpy:22
    old "Hands-on lessons!"
    new "Hands-on lessons!"

    # game/scripts/characters/tonks/requests.rpy:41
    old "Oral practice!"
    new "Oral practice!"