Small errors in the tutorial import

[thibaut1998e]

Hi,
In the tutorial here : https://ambersjones.github.io/pyhydroqc/SingleSiteExample/ , there are some small mistakes in the import
from PyHydroQC import anomaly_utilities should be replaced by from pyhydroqc import anomaly_utilities (etc.)
And from pyhydroqc import ARIMA_correct raises an error beceuse ARIMA_correct is not definied in the init file. It souhld probably be replaced by from pyhydroqc import generate_corrections