Change comments of portuguese to english

[thigs0]

Some codes have comments like above are in portuguese, they need be write in english

def heatwave_opt2_with_anomaly(ds:xr.Dataset, temperature:xr.Dataset, percent:xr.Dataset, n:int):
    # Cria uma cópia booleana com False por padrão
    ds = ds.astype(int)
    out = ds.copy()